The dizziness you are experiencing can be due to various reasons. The most common of them is when patient experiences dizziness on suddenly waking up from the bed due to fall in BP which is also known as orthostatic hypertension. The other causes can range from anxiety and stress, fever, severe dehydration, or sometimes minimal bleeding from the digestive tract.

I would suggest you to get a complete blood tests including Thyroid profile test, renal function test, ECG and also to check your blood pressure on standing and lying down to rule out orthostatic hypertension. Then, you can consult the neurologist with these reports.