my boyfriend and i had protected sex. after i began to have cramps i recieved my period a day earlier and was very light the next day i woke up with a stuffy nose later that day i realized that my boyfriend had left the condom inside of me, the next few days my period was heavier like usual but then became lighter it ended 2 days earlier and i am still having cramps. im feel extremly tired ,backaches head aches, nuaseaded but not throwing up. am i pregnant? what should i do ?