ok, so i normally have a regualr period... i mean... every month on the 28th, i get my period. and i have it for seven days. exactly . everytime. well, my husband and i thought i was prego bc we had sex once without protection. i got my period and it only lasted three days... and im not on my period anymore. if i was prego it would be no more than a month. could my period have stopped bc im prego? jw... i have a test but we decided to wait until my week would be over to take it. any thoughts on why this is happening?