I'm not sure what you mean by a "partial" root canal-- did the dentist or endo finish removing all the nerve (in theory or reality)? Also, it sounds odd that they can't fit you in (as an emergency) until March. At my endo, any severe pain after a RCT is treated as an emergency; they will fit you in right away. In any case, if they can't get you in for several months, I'd look for another dentist to finish the work or at least examine you to make sure that you've not got an infected tooth at this point. That could be very dangerous. Hang in there and keep trying to get an appointment somewhere. It just stinks that you are in pain and they won't do anything to help.