AF a week late and having severe pain

Natasha
So me and my husband have been TTC for several months this month AF was due on the 11th never came so I took a HPT and got a BFN. Been feeling a little off and having a few EPS but just kept ignoring them inorder to wait to test again today which I did and got a BFN again. An I had been experiencing cramping but now out of no where am having severe pain (like tugging/pressure) but still no bleeding. It just started a few minutes ago and if it persists I will probably go to the ER when the hubby gets home but I'm just wondering if anyone has experienced this?