I suggest you contact your internist and a podiatrist. Following lumbar fusion surgery in May, I had severe right foot & leg pain whose symptoms mimic yours. First thought was a reaction to surgery. However after testing for gout (negative), recieving 3 injections to my symptheic nervous sysytem (which provided significatn relief but not complete) I saw a podiatrist. I have a fracture in foot below big toe and Plantars. Plantar facious is very common. Prior to surgery I ignored the Plantar and blamed my foot pain on my over exursion and the result of a "bad back". I urge you to see a podiatrist even it is to rule it out. I have had an xray & MRI of my foot. Both interist & orthopedic doctor missed the fracture on the xray but the podi. saw it immediatly.
Wish you the best and a speedy healing.
regards
tj