There's also orthostatic hypotension where your blood pressure drops when you stand.

Definitely would look into the things mentioned above and possibly iron deficiency or anemia as options! Unfortunately a lot of things can cause what you're describing, make sure you're properly hydrated as well especially if it's hot where you live

Yes dehydration gives me this sort of dizziness a lot. Try drinking lots of water, making sure your blood sugar isn't low, and getting up super slowly to see if any of it helps.