i rubbed a boys penis for only a few minutes. it was dry, i'm pretty sure there was no precum or cum. i was fully clothed..after, i went to the restroom but first i washed my hands well. this was 2 months ago and I'm just starting to worry because I've had my period for a few weeks now. i've had a few signs but i think its just because i'm doing it to myself by over thinking it. please help!