Irrational guilt and fears about sex; fearing abuse

I'm a girl and I just turned 20. Never had sex or any kind of sexual contact, no kissing, nothing. It's something I don't really feel pressured to do and haven't found the right person, I guess. I was (finally) diagnosed with anxiety and depression 2 months ago after 10 years of showing symptoms. I'm currently on sertraline and feeling fairly better.

I've been worried for awhile now about my perception on sex. I do feel attracted to boys, physically and sexually and I'm ok with flirting a little, but as soon as they show real interest in a romantic or sexual relationship I just panic and eventually shut them out. Even the idea of kissing someone on the lips makes me anxious and the physical act of sex disgusts me. With this I mean I cannot conceive the idea of someone touching me sexually let alone have intercourse. It's something that hasn't changed since I started taking meds so I know there has to be some underlying issues about it.

I was a precocious kid (hit puberty at 6, was pretty much done with it at 12/13) physically and psychologically and I remember having an interest in sex that, as I think about it now, seemed excessive for a kid my age, maybe since age 4 or 5. I spent my childhood devouring encyclopedias on sexual health and pretty much anything I could find on sex content. I remember getting innuendos and initiating sexual talk with other children since elementary. Also being flirty with the boys and sometimes grown men. I'm honestly afraid I was molested in some way and can't remember anything, that maybe some event of the sort caused that deviation. I've read on symptoms of sexual abuse trauma and I checked many: the nightmares about being chased, anxiety, overtly sexual behavior, picking and scratching my skin, body image issues, feeling uneasy when being touched, especially by males, guilt about sex, acting provocative...Also feeling like I missed my childhood and wanting my child body back.

I can't ask my family about this without getting interrogated and it's really a conversation I don't want to have with them. I'm thinking about speaking to my family doctor the next apt. and see if he can refer me to somebody, but I need a broader opinion on this, maybe from someone who might be experiencing something similar.

Lastly, I apologize for the rant. I felt like the insight was necessary.

I'm a guy but I can kind of relate. When I see or hear about sexual things, I usually feel disgusted by it. I've had sex before just to try it and see if it wasn't so bad. I can't say I really liked it that much. I didn't even "finish" maybe that's why she broke up with me.
Anyways just know that you're not alone with how you think and feel and life is not always about sex.