Daily dizziness - what could it be?

Hi all. For about a month or two now I’ve been getting this nausea/dizziness/lightheaded feeling during the afternoons, mainly at work. It seems to be worse if I go to gym, but also only really effects me in a stressful situation. I have had my glucose and blood pressure checked. Blood pressure was okay and glucose was 4.6 two-theee hours after eating which from what I have read is normal. I do have a bit of anxiety but haven’t experienced a symptom like this before. 

Any suggestions? 

How old are you love? Does it feel like your floating, and a little brain foggy? 

Hi, I’m 23. Yes that is very similar to what it feels like 

there could be a number of reason ..I'd have a look at pots syndrome, but I think that manly effect's woman .. my guess PPPD vertigo 

Thank you. Agree these symptoms can be caused by so many reasons. I will look into PPPD, thanks for your comment  

I've been doing some more searching on my symptoms and I found this! Mal de debarquement syndrome( MdDs) this might be you!