possibly pregnant??

So i am on BC so my husband always cums in me and for the past week now my nipples have been hurting and are hard and I tend to get heart burns or nauseous and I am supposed to get my period in 8 days anyone think I am possibly pregnant? My mood is off like I may be hungry but then I am not and I am constantly getting diarrhea. I dont have these side effects before my period usually. We would be happy no matter what. I have been kinda wanting a baby so this has just been going thru my head. Any ideas?