Possible cause of hip pain w/ normal Ex-Ray & MRI?

I'm a 30year old healthy female. I've had ongoing hip pain in my left hip area for 6 months (no injury). It began shortly after a lumbar puncture (traumatic tap) so my first thought was that a nerve was hit and is causing the pain. My doctor, neurologist, and rheumatologist all say that is highly unlikely. It started very mild but has progressed over time. Some days the pain continues to be mild but other days it hurts so bad that I just want to cry. On the worst days, I limp around like I'm crippled and the limping has even caused bursitis on the outer part of my right (other) thigh. The pain is in the iliac crest area and hurts when I put my left foot down (walking), bump it against something, or roll over on it. I also "occasionally" have mild pain in my upper buttocks/ lower back. I've seen my doctor, a chiropractor, massage therapist, and a rheumatologist. My ex-ray was said to be normal so my rheumatologist ordered a MRI which, also, was said to be normal. He said the next step would be to see a neurologist again to see if it is some type of nerve damage. Like I said, that was my first thought, however, it doesn't really feel like a nerve pain. I guess I don鈥檛 really know what nerve pain is supposed to feel like, the only thing I can compare that to is tooth/ nerve pain. If it doesn't improve, I do plan on seeing a neuro after the holidays but I'm just curious to know if there is something else (other than nerve damage) that may be causing it??? Something that doesn't show up on a blood test, ex-ray, or MRI.

Additional Info/ question...Is there a condition that can cause optic neuritis and hip pain? I was diagnosed w/ ON in June; MS was ruled out by MRI and spinal tap. My rheumatologist ordered 30+ blood test and ruled out lupus, rheumatoid arthritis and similar conditions. The only thing that came back positive were some tests that show I'm at high risk for blood clots. I tested positive for h-pylori back in June and I don't think the antibiotics ever got rid of that. I have had almost every blood test, the lab knows me well. None of my symptoms seem to fit together. I have lymph nodes in my neck that have been enlarged for a little over a year. I had a non-cancerous mass removed from my breast a few months ago. I'm probably leaving a lot out but that's all I can think of right now. I'm hoping a doctor reads this who is able to advise. Thanks in advance.

If the mri came back neg- that is should don't be from a compressed disc- I had a epidural years ago- 1st attempt was in the wrong place and caused immediate excruciating pain- and 2nd attempt - worked fine--the only other thing I can think is nerve tests- nerve conduction- where they put the little needles in the skin- I don't know how difficult the nerves are to visualize- but the nerve tests should pin point and know if they are conducting properly-D

is there burning? this would mean it's a nerve issue.

Believe it or not but just trust me and get your knees and ankles checked.