Weird period or pregnancy signs??

So my period ended thanksgiving day and a week after i started getting really bad acid reflex and I've never had that. My lower stomach hurts like mild cramps, and I zone out a lot more than usual, super tired all the time even with 8hrs of sleep. My period starts in 12 days but idk what's going on and it's confusing. Idk what to think or do at the moment....