Based on the chronic conditions I've seen, any improvement is already a great start! However, of course dealing with continued symptoms is very unpleasant, but I can honestly tell you: with chronic, autoimmune conditions, there shouldn't be an expectation of getting 100% back to how things were before. It's not a realistic outcome.
That's not a call to stop fighting; on the contrary, it's a call to keep going until you find a solution that works best for you.
I understand that scheduling difficulty as well; it can sometimes take a while to schedule appointments for even common things. Is there a way that you can get the blood test done at a phlebotomy center? If the doctor has already ordered the blood test, you can technically get it done outside of the office as well.