can you still be pregnant if you had your period?

Elaina
Hey girls so I need some advice. I had my period and today is three days post period and I'm still having cramps, back ache and omg am I craving something. This makes might be irrelevant but I've had the hiccups every day the past two weeks off and on. I took tests around the first couple days before my period started cause I thought I was late. All my tests were BFN, is it possible I could still be pregnant even tho I had my period?