I hope the steroids start working for you quickly and that you are up and running by August. I have no doubt in my mind that you won't be.
It is hard to say what they are looking for on the blood and urine tests. That is probably a question you need to ask your doctor. They may be running standard tests. I get blood tests done every 4 months; one is usually a blood cell count test (I think - better look at my recent order. LOL.) and the other is a liver function test. This may be what your doctor has ordered.
Sending you gentle

's. I don't want you to fall over. lol Feel better soon and let us know how you are doing