My periods are always irregular. My number of days in cycle are different every time... this is what I mean:
Feb 7 : 28 days
Mar 9 : 30 days
Mar 30 : 21 days
Apr 26 : 27 days
May 25 : 29 days
Jun 21 : 27 days

Well... it's now July 22. My period has not arrived.

I am worried because since June 22nd, I have become sexually active with my boyfriend. We've done everything... except intercourse. I've read stories where people got pregnant even without intercourse... this is what worries me. I never knew of this. In our activities, pre-ejaculatory fluid is involved, but never ejaculatory fluid. However, pre-ejac fluid does contain sperm... so this is what I'm also worried about. Since June 22nd, I've been intimate with my boyfriend 6 times. Our genitals never touched skin to skin. However, I've read stories where if the males hand had contact with fluid containing sperm and used the same hand on the girl "down there", there is a chance of pregnancy. However, I don't remember if this happened with me and my boyfriend but I'm also uncertain.

I am aware that there are many factors that can cause my period to arrive late such as stress. Yes, I've been stressing over my period and other factors. But I think my stresses are only mild. I also want to point out that since my last period, my sleeping schedule has changed dramatically. I usually slept from 12 am to 6 am everyday (school days). When summer break approached I started staying up late... sleeping from about 4 am or 7am in the morning to 2-3pm in the evening. I am 16, which means (I think) I'm still developing.

What do you think are my chances of being pregnant based off everything you've read?