How Can Severe Backache And Abdominal Distention Be Treated?

4 years ago I gained 50lbs in 6 weeks and my abdomen swelled HUGE. I went to the emergency room but they never found the cause. Thought it might be related to autoimmune hepatitis but no confirmation. I still have cripplibg sciatica and back pain from my huge abdomen and look very pregnant. I can swim, but can only walk very small periods a a time. Doctors have given me no ideas except dusting to lose weight, they don t believe my diet is very clean, low in calories and I drink large amounts of water. I now also have extreme swelling in my legs and ankles. I am miserable. I don t know what kind of help o seek. Prior to this I was extremely actve and worked hard o diet and exercise to reach and stay at goal weight. I used to swim, run and weight train 6 days a week. I have to wear maternity pants as plus size clothing s overall too large, its just my stomach is enormous and hard.