I've got something similar, bursitis, mortons neuroma, all similar sensations ,if I may suggest, do you use spd's ? have you got shoe inserts ? (sorry if you've been through all this) but if you haven't give up the spd's and get some orthotic inserts specific for you from an orthodontist, expensive but worth it, probably won't disappear but will lighten up enough for you to ride, mine prevented me for a while from walking also, but after the inserts thing improved ,i'm about 15 yrs down the road with that one now, hope this helps...