you must have document proof that you had tested positive, so civil doctor can check the box and waive your TB skin test. doctor also needs to keep a copy of your proof in your file(medical record).
I suggest you submit your I-140 & I-485 with the current medical report, to get an earlier RD. Even getting a RFE later is better than waiting for another three days now. See how many people are doing the downgrade? Just my two cents. Ignore it if you will.