My body tells me yes but the tests says NO!

I had my period the 15 to the 21st this month, egg release day was the 28th according to glow. (took a whatever test on the 27th, negative!) we did the deed on the 15th,17th,19th,20th,23rd,25th,27th,28th,30th, nd 31st. So on this Sunday the 28th I started getting really bad cramps in and wrapping around lower back area sometimes with a shooting pain up my right thigh. it hurts most when sitting down even just to go pee, and while I was cleaning I bent over to pick up trash I swept up and back locked on me and I have to stand straight up quickly for the pain to go away. this morning I got up outta bed and could hardly walk or move.

Does This Sound Like Anything To You??