STRETCHED OUT FEELING

Hey ladies!!

Has anyone ever had a tightness/stretched out feeling in their lower abdomen? This is the 3rd day in a row that I've had this along with mild cramping similar to pms cramps and a pulsing sensation (like a heartbeat). It almost feels like someone is lightly tapping the area above my bladder. I'm 11 dpo, my bbt is still above the coverline, I dreamt of a bfp last night but have been getting bfn's 😞😞 AF is due anywhere from 3-5 days, what could this be and why haven't I had this symptom any other cycle??