on the 21st april my bf and i got physical. we didnt have intercourse but he ejaculated in my mouth, then we made out and then he went down and licked my vagina. i got my periods on the 7th of may which was my date but they were a little irregular (less flow then heavy flow then again less flow). my periods were due for the 6th of june and i havent had them yet. could there be a chance that i am pregnant?