Continous Head Pressure. Please help me!

I am suffering from pcod from past 5-6 years and do not get periods without medicines. I was on treatment for the same and suddenly lots of head problems started in 2012. It's been 5 years now I feel continues pressure around my head and sometimes it feels like inside my head it's revolving. Doctors prescribed me sertaline saying it's due to stress,I took it for 1 year. Now I'm taking homeopathy from last 1 year for pcod n head pressure too,still not getting any results. Earlier they said it's vertigo,others say its stress and some said it's due to hormones. I can't do any physical workout for my pcod problem due to this unnecessary pressure around me,sometimes I feel out of balance too while walking,standing,etc. No one can diagnose yet what is it,I'm also doing night shifts in a bpo. Please help me regarding this because no one live with this pressure all the time on head,its very difficult for me because I'm not getting properly diagnosed for this head pressure.