it comes and goes but now is getting worse. I have sufffered from dizzieness and migrane for 4 years. But now it's all getting worse. INcluding see floaters in my eyes. COuld i have some type of blockage in my neck viens that are causing this light headed feeling and dizziness?? i have had an MRI & CT scan but not of my neck only my head. I am now on my 4th doctor. PLease help and thank you for any suggestions. No one seems to know how to help me and i'm only 47. sometimes i think the doctors don't think outside the box.