Welcome to icliniq.com.
I have gone through your case and can well understand your genuine health concerns. The cause of your symptoms can be related to brain disorder or vitamin B12 deficiency or eye problem. In my opinion, you should consult a physician first because you need a thorough neurological examination. These symptoms can be related to cerebellar disease which is a part of the brain. Vitamin B12 can also cause balancing problems, headache, concentration issues, etc. Sometimes, a refractive error in the eyes can also cause balancing problems, blurred vision, headache. I suggest you consult an ophthalmologist also. Get your serum vitamin B12 done. If you have low levels then you may need B12 supplementation.
The Probable causes:
Cerebellar disease or vitamin B12 deficiency, eye problem.