Worse cramps then normal

Hi everyone,

I’m 12 DPO and AF supposed to come in 2 days. I’ve had horrible cramps and back pain for 3 straight days unlike I’ve ever had before. I’ve never had them all day long with the only relief coming from a hot pack. I’ve been exhausted and worn out from them and a little concerned. Brest tenderness as well. Is this abnormal PMS or possible pregnancy?