There is a huge range of ‘dizziness’. I have found subtle differences in how it feels: from finding you are holding onto furniture in the house or weirdly using your toes to hold onto the floor ( noticeable in the shower) , sometimes it’s like you are on a rough sea, other times I have a real feel of spinning head over heals,. With my present dysautonomia I have completely blacked out. A tilt test table perhaps might diagnose what is happening with ‘dizziness’,,,I’d keep a daily diary recording when it comes on, how it feels, and for how long, and ideally record your HR/ oxygen levels with simple oximeter, and BP/HR….to narrow down one or more likely causes.