Symptoms suddenly getting worse? (30s F)

I’m pretty sure I’ve had adhd forever (both siblings diagnosed and I work in special education). I was on adderall briefly through Done, so I supposed I have a diagnosis but I don’t really believe in their diagnostic criteria. The meds helped a lot though felt a little on edge sometimes. But it wasn’t covered by insurance so I eventually stopped. That was ~2 years ago.

Over the past ~6 months, I have taken a nose dive in my cognitive abilities. My working memory is trash. I will see something online, think “I should google that,” open a tab, and immediately forget what I was going to look up. Like literally in a matter of 1-2 seconds. Same with things like doing calculations in a calculator—if I clear the number but need to re-type it, I will have to start over and write it down because I literally cannot hold on to it for longer than a second. I also struggle more often with word and name recall, and recently I’ve been dealing with time blindness which is something I never really struggled with. But a few times now I’ve been doing something and then looked at the clock and it’s hours later than what I thought. It’s really disorienting. There’s other things too that are interfering with work because I’m not seeing errors and details and cannot focus unless I’m doing three different things and it’s driving me crazy.

Does anyone have any idea what could be happening? Does this sound like adhd or something else? Am i just getting too much screen time? Did I blackout too much in my 20s? I also have issues with vasovagal fainting and orthostatic hypotension if it matters. Appreciate any input