Completely lost

My boyfriend and I are very religious we have decided not to have intercourse however hormones took over and we were fooling around both not wearing underwear I was just sitting on top of him there was no intercourse, I am sure his precum was on my vulva and in me but not in in me. That was march 20th and that night I got my period and I am sure it was my period. We have not done anything since then and now April 22 I have still not gotten my period I am only 16 and my periods are usually irregular I have a lot of discharge and I am terrified of being pregnant I am so stressed so that may be reason for missed period or just irregular nothing is sore or anything I just need advice please help me