In my experience with having had similar issues in the past. Not so much the 'making out'. I'm going to give brief, and I mean very brief details. During intercourse with my 'first' the condom decided to split. Obviously I knew even after withdrawing immediately there was still a very good chance of inpregnating my girlfriend. The chances were very low, even with 'pre ejactulative sperm' and the combination of spermecides I was worried and so was my girlfriend. The outcome is obviously clear to everyone that knows me, she wasn't pregnant but the stress of thinking she was made her miss her period for 2 months. We went and got her the morning after pill (only 9 hours after). I know this can interfere with a womans cycle which probably explains nearly 60 days of 'sh**ing yourself'.
My advice. Even if you know this guy really well - ask for a STD test. Get a pregnancy test and next time don't let anyone take what I'd call 'advantage' of you. Age and Vigin status really isn't an issue here.
Good luck and I hope you get the result you desire.
Dizmo.