What Is The Cause And Treatment For Chronic Foot Pain?

Chronic foot pain since august 2014. Nothing appears bad through xrays, have done 5 x rays and the drs didnt see anything wrong. Had MRI done and they said it was a cuboid stress fracture, had a boot for 6 weeks and then another pain started near the ankle and the the drs said it was tendinitis. After a month of therapy, pills, inyections, cold/heat packs and still with pain on the ankle area and near the middle of foot. Also had blood examined for arthritis and dr said it wasnt arthritis neither high uric acids. Please I would like some help I cant stand not being able to walk without pain Im male 32 years old