MP is quite often misunderstood. There are other things in the hip that can give similar pain. One is trochanteric bursitis.

MP pain occurs when the lateral femoral nerve is pinched somewhere in the abdomen or at the exit in the inguinal area.
You can also have a blood clot which will affect this nerve.

This nerve is SENSORY only and does not affect motor function.
It stops above the knee. It does not go down the back of the leg.

Here is a something to read:
Figure 2b shows this nerve.
http://www.aafp.org/afp/20000401/2109.html
MP often arises from abdominal surgery where the nerve may become entrapped, or from L4 issues where nerves may be pinched. People who get bone biopsies or donate marrow sometime have damage to this nerve.

Lying on that hip could be causing bursitis which is a different thing. Often an injection can help this cause.
The trochanter bursa is shown in Fig. 1.

Perhaps seeing a sports medicine doctor would give you a better evaluation and treatment for this hip problem.