I get this head pain on the left side of my head from a long time,floaters will always float on my eyes,feels like faintind( giddy) all the time-mainly the next morning more if I drink alcohol,I had an appointment with the neurologist also and he says its nothing serious to worry about,there is also pain in right side of stomach alone with IBS,and I always think I suffer from a serious disease,its killing me what can it be?????