Severe pain on left side above hip joint. I cannot lay on this side when im alseep. Iit is also hot with heat. Is this arthritis?

Trochanteric bursitis. This could be trochanteric bursitis or lateral pelvis myofascial disease. This did not sound like you have hip arthritis. L therapy could be, physical therapy, massage, injection, topical analgesics and anesthesia and exercise, etc.