If this was one of your first few sexual encounters then it is possible that your hymen was torn during the process. A hymen is made of very thin tissue and it is fairly easy to tear or stretch. It's located at the entrance to the vagina so, actually, it isn't inside of the vagina. The hole is there to allow menstrual blood to escape the body and is usually too small to naturally accommodate an entire penis to enter the vagina without being stretched.
If you do have vaginal intercourse and you do not completely break/tear your hymen it will stretch out and create a larger hole, just as your vagina will naturally stretch out to accommodate the penis. Some hymens are elastic enough to permit a penis to enter without tearing, or they will tear only partially, and there may be no bleeding at all. Usually women do experience some bleeding when penetrated.
Bleeding can also be a sign that you are not lubricated well enough. The friction that sexual intercourse causes can actually tear bits of the vaginal walls and cause the bleeding. Some women have problems lubricating their vaginas well enough naturally for penetration to be possible. You may need to invest in some sugar-free lubrication to help things along if you are going to continue engaging in sexual activities with your partner.
Also, an infection can be the culprit of bleeding during intercourse. Sometimes the infection is easily treatable but only a doctor can really tell if it's a yeast infection or bacterial. If it's bacterial then you will need a course of antibiotics to clear it up--if left untreated it can do major damage to your body and lead to infertility even. If it happens to be a yeast infection and your doctor confirms it, you will be able to purchase over-the-counter treatment such as Monistat (the 7 day treatment seems to be the best of the bunch).
There are also some women who have a bit of a problem with their cervix. The cervix is inside of the vagina, between the top of it and the bottom of the uterus. It is narrow and widens during childbirth to allow the baby to exit the uterus. It also allows menstrual fluid to be released from the uterus. Your cervix also works as a sort-of vacuum during sex--naturally pulling the semen from your partner into your uterus.
Sometimes a blood vessel in the cervix can become inflamed and irritated, causes it to engorge with blood. When the friction of the penis hits it, it may burst open and bleed.
This also may mean that your cervix is infected, usually caused by gonorrhea or chlamydia. It may be in your best interest to get a full STD/STI screening because if you have either of these it may cause some horrible problems down the road.
Also, cervical ectopy is common in young females (under 20) so it may be a concern for you. Usually the female is pregnant and is unaware as well so you may want to look into a pregnancy test if there is a possibility. In short, the fragile tissues that are inside of the cervix canal migrate to the bottom of it, becoming exposed to pressure and irritation from the penis during sexual encounters. This can cause it to become swollen and even more fragile actually so it's best to see a health care provider about it.
I am a bit concerned for your health and safety at this point so I feel I should include some links regarding sex. I really think it's best that you be as informed as possible so that if you run into problems you are able to seek the right sort of help.
And here is just something simply for you to read and think about. I read it and thought it was pretty neat and gave some good points: [Link](Mouse over link to see full location)
Here is also a link on some things about virginity. I think it has some neat points and gives examples to explain what they're talking about: [Link](Mouse over link to see full location)
The bottom line is, you need to make an appointment with your gynecologist to get checked as soon as you can. If it's something serious then it's best to know about it right away so you can get treatment and it doesn't progress into something more severe. You may want to postpone sexual activities until you have been seen at the doctor's office so that you do not make anything worse if there is something going on down there.
I hope you become more knowledgeable and find out that you are a healthy person. If you have any more questions regarding this subject then please feel free to ask me :) [ Peeps's advice column | Ask Peeps A Question ]
Attention: NOTHING on this site may be reproduced in any fashion whatsoever without explicit consent (in writing) of the owner of said material, unless otherwise stated on the page where the content originated. Search engines are free to index and cache our content. Users who post their account names or personal information in their questions have no expectation of privacy beyond that point for anything they disclose. Questions are otherwise considered anonymous to the general public.