Unexplained Leg Pains?

I’ve read here already about leg pains, but I didn’t see how old messages were. I’m having very sharp shooting,local pains in back of right thigh at the same spot every time. They last about 30 sec each time & between 7–10 on pain scale. They started in Jan 2016 & when 1st started I maybe had 6 in a week. I’m now having anywhere from 5–10 daily,sometimes more & always without warning.I’ve been having othe leg issues(weak,heavy) but dr doesn’t I’vedoesn’t I’ve think sharp pains related to other lef issues.I’ve had ultrasound to check for any blockage in vessels-clear, Xrays- nothing visible on my leg, but some calcification on my hip (Bursits),EMG-nerve test & no nerve damage found. All tests good & negative for any anti-inflammatory diseases. Soft tissue MRI scheduled next. Any suggestions? We(Dr & I) are trying to figure it out. Thank you