Me & my boyfriend had sex on April 21(one of my fertile days) we did it two times before he put on a condom but i don't think he ejaculated but I have a normal 28-day cycle & i was expecting my period on May 10 but it didn't come so on May 12 i had some blood when i wiped & one drop when i put on a pad & i also had slight cramps i thought it was my period but it lasted only one day, every since i have been having clear, wet discharge, but i have been kind of stressed could it be pregnancy or stress ?