recalcitrant metatarsalgia

I have a bad back so I used to squat alot. I got a ?neuroma about a yr ago in one foot which partly resolved (I could walk 2 miles but not hike) with one steroid shot. Told no more steroid shot d/t fat pad wasting. This all develped wearing good running shoes and hard plastic custom orthotics.Four months ago, squatting flat, I developed metatarsalgia on top of this, where I cannot walk at all without limping and pain. I got new, soft orthotics with metatarsal/neuroma “bump”. Have been having PT…at this poing my achilies and calf flexibility are excellent, as is my strength of all my muscles. Originally we found my plantar facia on the effected side was very tight and had been pulling on the metatarsals…that has been stretched and lengthed to the point my gait is normalSince then, I have been getting iontophoresis with a steroid. It works temporarily, dectreasing pain somewhat. But I seemingly can keep reinjuring myself just by walking a little too far, moving the wrong way while on my feet etc. I have only four iontophoresis left… It isn’t improving I keep hurting it because it doens’t hurt in the moment whatever I do wrong (say, walk too far)… It hurts ONLY THE NEXT DAY.
I am housebound and can’t work pretty much at this point. Is there anything I can do? I dont’ have health insurance, but am willing to pay out of pocket for podiatry if there is something they could do or figure out. recent blood tests are negative for diabetes and arthritis markers.should I try rocker bottom shoes? I MUST get a life…
I need to wald some for the work I do, and cannot get a desk job because of chronic lower back pain. I physiatrist says (after MRI) that my back is not related to the foot painHELP