 [ Symptoms ] is it possible to start your period a week early  i have been keeping up with ovualtion and i was ovulating saturday march 10 i had sex friday9 and on sunday11 started cramping during the week and was throwing up and nasuea on thursday14 and friday15 and now on the 17 of march i am bleeding and it doesnt feel like a normal period im crampin more and its light one minute and heavy the next [ Disease ] you and your girlfriend are safe for now sex play tends to progress to the point where it may become more risky in the future so please be very very careful no sexual contact without a condom my friend keep those sperm where you can keep track of them highly unlikely