Correct about Lyrica, it only helps with pain, it's an antiseizure drug, I think. It's no help with inflamation, tears, ect.
Had an MRI of my foot also cause x-rays looked like there was a break in heel spur. There wasn't a break & got dx of plantar fascitis (sp?). Was supposed to be in PT for 6-8wks but after 4wks was sick of going & did exercises at home, finally got better & didn't limp anymore. But had limped for months before seeing my foot doc. From start to finish the whole mess lasted almost a year & boy was it painful. For now both feet are fine.
Don't know what your dx could be. Hope they figure it out soon so you can get some relief & mobility back.