Sarah,
Agreed that seeing your doctor for updated films or opinion is best suggestion and hopefully it will be something that might be calmed down without further surgery tho if you have to go there..well, you've been there.
I'm impressed that you were able to go back to nursing and hope it hasn't been in a strenous capacity altho you sound like you've a well rounded active lifestyle so am just wondering if a rest from "it all" will help your situation too.
Guess you'll soon find out. Please keep us posted and wishing you the best