Hello dear,
The symptoms as mentioned in your post can be attributed to:
1. Cerebellar dysfunction.
2. Any fluctuation in blood pressure levels
3. Altered blood sugar levels
4. Inadequate hydration & nutrition status.
5. Deficiency of certain nutrients like Iron, Vitamin B 12, Calcium, 
Magnesium, etc.
Investigations like 
complete blood count, estimation of blood pressure and blood sugar levels will be helpful in clinching the diagnosis.
A CT scan of brain may also be needed.
Symptomatic relief can be obtained with nervigenic agents (like Vit B6, B12, 
Folic acid) as well as 
multivitamin & mineral supplementation needs to be added in the diet.
If symptoms still persist, kindly 
consult a Neurologist for a proper clinical examination.
Wishing a good health.
Take care.