Head Pressure , Off Balance , Diziness.

I have been experiencing continues heaviness around my head since 2013 July.I do feel off balanced while walking,standing.I feel moving pressure on head all the time.When this started,initially I felt giddiness all the time and I couldn't hear properly for about 10-11 days. It all started suddenly after I felt giddiness once and prior to it I was on Mala D pills for about 7-8 months due to my pcod problem.Balance problems while standing were felt at that time when I was on pcod treatment. I have been taken anxiety medicine also but it dint work for long.I don't know what it is but I have been taking different medicines since then but no solution yet.At present I'm under continues pressure around head n body,tired all the time, dizziness,low energy,disequilibrium while standing,cannot stand still it feels like heaviness moves around me.Kindly help what is it , because icant even explain how weird I feel in this heaviness,it is irritating.N I get no periods without medicine,....pcod.