my boyfriend and i had sex twice on june 23rd, protected and unprotected. he did not finish when we were having unprotected, we had it for about 5 minutes and then i told him to stop and i felt comfortable so i just gave him oral instead. my last period was between May 30th to June 4/3 it is now July 4th, i believe my cycles are a bit irregular but it's been 28 days since my last cycle. am i just stressing which is making it worse. and it's been 2 weeks since the "unprotected" sex. and i have no symptoms of pregnancy but i have my normal pms symptoms such as, backache, moody (irritable) and hungry.