Sudden dizziness, same time every day

[DaanSaaf]

Past 3 days I've had sudden dizziness starting at 11.30 am. 1st day I hadn't eaten so had breakfast which didn't help, 2nd and 3rd days I'd already eaten.
Days 1 and 2 I was in work, today at home. Dizziness lasts the rest of the day and was sever enough to make me pull the car over on Thursday.
I am on my period but light flow.

Any ideas what could be causing it?

I had this and was aneamic in folic acid. get your bloods done. Maybe go to pharmacy and ask for some multi vitamin with iron and folic acid to see if t helps. I felt instantly better once I had my first tablet

That's helpful, thanks. I can't take iron supplements unfortunately but have had an infusion in the past due to anemia. I'll get my bloods done.