Question about possible past TIAs in 58F

58F here, 5'5", 170 lbs, white. I am treated for hypertension (lisinopril) and have pre diabetes. I don't have a history of anything cardiovascular but Mom had a heart attack at 50 and her relatives had heart attacks and strokes. Dad had hypertension in middle age and later dementia with vascular and possibly Alzheimer's features.

I am writing now in response to another post about a possible TIA. I had something similar happen to me several occasions (3-4 times I think). My symptoms were that I woke up feeling more groggy that usual (but not insanely groggy at all, just noticeably a bit more fuzzy than my usual morning self) and stood up quickly from bed (as is usual for me) only to find that I could not walk normally (like a drunk walk) and this led to falling into a table on one of the occasions. My doctor (when I finally saw her to discuss all this) thought it was likely orthostasis but didn't rule out the possibility of TIAs. Regardless, I haven't had a stroke at this point and the first of these episodes was several years ago now (fall, 2022). I didn't go to the ER any of these occasions. I did contact my doctor's office with the worst episode when I fell, but a nurse or NP in my primary doc's office felt it was probably sedation from psych meds (although I've been on the same medicines for decades and they don't cause sedation for me) and as far as I know, it didn't come to the attention of a physician until I consulted my doctor later.

My question is how likely is it that this might have been TIAs versus orthostasis? I realize it may not make a huge difference since there is nothing I can do other than try to be healthy going forward for stroke prevention, but I am just not sure how concerned to be.

If relevant: meds included, at the time of these episodes, lisinopril, Effexor XR, aripiprazole, gabapentin (which I had been taking for a long time for sleep) and trazodone. None of these meds were new to me at the time. I don't smoke, drink or use drugs.