If there is still pain and some swelling with a metatarsal stress fracture- after 18 weeks boot, crutches- does it mean still injured? what to do?

No stress to stress.: Look at it this way. Every time you apply weight to a stress fracture, you are re-injuring it. These types of fractures are often underestimated as to their potential healing problems. Probably, it might be best, for all considered, to have a new set of eyes looking at your problem. Four and a half months is entirely too long.