Well, i had sex on the 10th of August (unprotected)& i have been spotting, had lower back cramps, my sides have been hurting, stomach cramps like my period but no blood, i haven't had a period since i had sex and when i did have sex it was the 2nd day after my period ended, my breasts are starting to get sensitive and I've gained a few pounds... could i be 7 weeks pregnant?