I Went To The Er Cause I Had A Very

I went to the er cause I had a very very bad pain in my leg. it started above my foot around the ankle I thought nothing of it. The pain continued up my leg and hurtled more from my knee to the bottom of my foot. I was taken to er and had all kinds of x-rays and mri and nothing they said but yet I had a cold foot and a warm foot at the time plus the er gave me morphine like 5 times and got wheel chair out of the er in others words I went to the er in a wheel chair and left in a wheel chair with the same pain I went in. went to my family doc had ne go back to the er cause a vascular doc was going to check out my feet but it boiled down that nothing they found nothing wrong and me with pain. then I went to an orthopedic doc and it was a use. the thing is that I'm still in pain and no doctor finds anything wrong. What do you think this could be?