Another strange question from a new lupie lol

So every time I go to the dr my pulse and bp vary greatly…my pulse has been as high as 118 (I wasn’t in much pain at that time) and as low as 60. I always am waiting for atleast 15 min, just sitting there. My bp has gone anywhere from 90/60 to 140s/80s. Anyone else have this and any idea what causes it? I know that none of the numbers are too concerning but as a nurse we are trained to know our patients baseline…and I don’t seem to have a baseline, it always varies so much. And I have quit drinking caffeine, and wasn’t on meds when this was happening. Thanks for any input!