Thank you for waiting.
I am very sorry for your symptoms.
I understand your concern.
The dizzy feeling can be due to a few causes.
Fluctuation of blood pressure, glucose can cause it.
Anemia, dehydration can be factors.
Heart issues, rhythm abnormalities can lead to the symptoms.
As your heart tests including Holter came out normal, there is unlikely any heart issue.
It can occur from anxiety or stress or neurological issues too.
BPPV or benign paroxysmal positional vertigo is a common cause for vertigo & dizzy feeling.
It is common & it can be a factor.
It is due to displacement of inner ear crystals.
Repositioning can help to correct it.
I would advise to get an examination by an ENT doctor.
I hope this information will be helpful.
If you have any query, please feel free to ask.
Your satisfaction is my goal.