I've actually been doing a little bit of reading on this recently. It sounds like you are dealing with orthostatic hypotension possibly. Here is a link to the "Merk Manual" & what they have to say about
There's actually a ton of info on this on the internet, just 'google' Orthostatic Hypotension & you will get a better understanding of what is happening.
I have read in many places that this is fairly common for people with tick-born illnesses, but I don't recall what was said about
what to do about
it. I would heavily suggest you talk to your LLMD about