What you describe sounds more like your "conscience" or "moral compass" speaking to you.
On the other hand, if you are hearing a distinct voice speaking to you which is not your imagination, then perhaps you are experiencing an auditory hallucination.
Or, if you are willing to believe in the paranormal, it could be your spirit guide talking to you. I have never personally experienced anything paranormal, but many people claim to, too many to be summarily dismissed. If the notion of a spirit guide intrigues you, read some of Sylvia Browne's work, or visit her website, or watch her on Montel Williams.
On another note, there are many, many experiences and feelings that are normal for a teen but not for a preteen or an adult. Adolescence is a wild time for the human body and mind. You undergo changes on every level: physically (including the muscular/skeletal system, endocrine system, and brain), mentally (personality, social aptitude, world-view) and spiritually (religious beliefs as well as "spirituality" which would transcend religious dogma and is believed by some to exist independently of religion).
Whew. Point being, whatever you are experiencing--and your one-sentence description leaves much to the imagination--it doesn't sound abnormal for a teen.
But I would prefer a more detailed description of your "advisor" if you want me to give you a more INFORMED opinion.
Until then,
Dr. Chad
P.S. Did you send me the question twice because there are "two" of you? Neither of you could spell "advisor", but the second try was closer. :) ;) [ Dr_Chad's advice column | Ask Dr_Chad A Question ]
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