Feeling not real. I supposed to do now?

I felt dizzy for in january.After that i felt the same for 10 days in march.Without treatment it stopped.Now,  im feeling the same dizziness for almost 2 complete months.i dont know whether it is dizziness or not.I feel not real.Im having lot of troubles in digestion.I dont feel nausea but im facing frequent stomach aches and stomach troubles.Im also having sensitivity to sun light currently.Im afraid whether it is because of some brain damage.i had a accident before one and half a year with mild head damage..is this causing me the problem.... My doctor told me that i just have a nose and throat infection and he gave me tablets... Im taking those tablet's for the past one month but there is no use.... What am i supposed to do now?