Thanks for all the replies.

I would guess that there is a 50/50 chance that I will be extending my stay past the end of February, if I can find a good doctor, or clinic, who can treat my back pain. It is doubtful that I can find such doctor/clinic and complete all treatments they recommend in less than 2 months time, so extending my return flight to a later date is highly likely.

If none of the doctor's there believe that they can help my condition, I will return home at the end of February as currently planned. Finding the right health insurance to cover my medical treatments outside of the USA is proving much harder than I had first imagined. Getting a straight answer from any health insurance representative is almost impossible.