Alright I'm really really stressed about the possibility of me being pregnant. It's gotten to the point I can't eat or sleep so please someone tell me what's going on.

July 25ish I had my period

Aug 3 my boyfriend accidentally came on me (on my thigh but close to my vag) but I was wearing underwear and a panty liner, so I think I'm fine but I'm not sure

Aug 17 I had my period

Sept 17 I had my period

Oct 10 I started taking a daily dose of Menocycline for acne

Oct 19 I noticed my period was late so I induced it with vitamin C supplements (1200mg day 1, 3000mg day 2)

Oct 21 I had my period, but it was lighter than usual

I don't know if the menocycline is messing with my cycle or not, or if i have something else (perhaps a cyst?) but I've been EXTREMELY stressed and I don't know what to do. I've never had sex before, so I'm thinking my chances of being pregnant are low but I'm still concerned and hoping that my periods were not actually vaginal bleeding from pregnancy. I read that you can't induce your period unless you've ovulated, and you can't ovulate while pregnant. So if I'm not, then what is it? Someone please please help, thanks.