Hi! I am trying to decifer whether I am pregnant or if my period is just late - my last period was dec. 17-21. my boyfriend and i had sex a few times during the first week of january; never more than once and we always use protection. he actually only ejaculated during sex one out of the 3 times we did, the other two he did not finish and he actually masturbated to finish. i was suppose to have started my period on the 18th of january. i realize that high stress can play a big part in a late or missed period. just after my last period i was home for the holidays and lots of arguing was going on the whole time [i actually broke down crying one night], and then on the 11th i was actually in a car accident - we have had really bad snow and i was driving down a hill and actually slid off the road and hit a telephone pole [this has never happened before and i was in shock for at least a day]. a few days after the accident my mom called and was asking me if i had started my period or not, and got me freaked out because she started telling me i should have started days before that, and thus my boyfriend and i started freaking out about the possibility of me being pregnant. there has been a LOT of fighting between my boyfriend and i because we are both so afraid that i am pregnant [its not something i would be looking forward to right now] and so there has been an extreme level of stress in that regard. i took the clear blue digital pregnancy test on the day i was originally suppose to start my period [the 18th] and it said i was "not pregnant". I still have not started my period, but i have been having cramping. I have read about the implantation cramps, but that they are suppose to occur 5-10 days after fertilization, which at the latest would have been the 14th. the cramping did not start until yesterday [the 19th]. my question is really what should i do? i have one more clear blue test - should i use it? if so, when? what is the likely hood of me being pregnant?