Alison,
It is so good to see that the Ketamine provided you with some relief! Maybe this will be the start of something good. Being in less pain is always good.
I strongly agree that they should check you to eliminate the possibility of a blood clot in your arm. Please do raise that question with your doctor or with the ER.
Your education is so very important, and if it comes down to spending less time in the online community please know that we will be glad to hear from you when time permits, but your studies must come first.
Take care,
EJ