It often has no symptoms especially for men. You can get Chlamydia from having unprotected sex with someone who already has it. Whether or not that person cums has nothing to do with it. If your genitals were in contact, you could have got it.
1. Always use a condom even if you use other forms of contraception. Not using them can lead to much more serious STIs and STDs in the future not to mention pregnancy.
2. If you think you have any kind of STI or STD, go to your GP or doctor, or a sexual health clinic. Don't be embarassed, they have seen it all before and if you leave it untreated it can cause long-term problems including infertility (not being able to have children).
3. There is a lot of information out there about sexual health, I'm here to answer questions the best I can but remember, google is your friend.
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.