Cramping and backpain could i be pregnant

Nichole

Me and my husband have been having unprotected sex a week before my ovulation and I had my ovulation on the 2nd of September according to the app and my bbt was 97.7 when I checked it yesterday and this morning but I'm starting to have back pains and cramps in my stomach since yesterday could it be that I'm pregnant even though it's still to early? I feel like my stomach is starting to stretch. Help please