Suggest Remedy For Severe Pain In Right Leg And Hip

Last thrusday I had what I think was food poisoning, vominiting bile for six hours followed by diarrhea. Since then I have been experiencing severe pain in my right leg and hip, in the muscle running down the outside of my thigh. Should I be worried? I have used heat, rest, massage and stretching, and a muscle relaxer (500 mg robaxin) that I have for my back, all to no alleviation of the pain. My stomach remains very tender. I lost 12 pounds, am now consuming almost 1000 calories a day for the last two days...