Yes, definitely see a doctor in case it's serious; if you do have a urinary tract infection, ignoring it can let it travel to your kidneys, and then it WILL be serious.
I don't think urethral cancer would inspire most doctors to recommend GRS, either. (That's a fairly extreme solution, and they prefer to use the least invasive and most commonly established treatments.) I would also think that no reputable GRS surgeon would agree, because it is well known that surgery can spread cancer cells around - rearranging tissue means that now the cancer has been moved to places it might not have gone on its own, and that's not a good thing.