Dizziness headaches ringing ears vision issues etc...?

Since last November i have been experiencing headaches and dizziness... i went to the gp several times.. in the end i had an MRI and it came up fine except for swollen adenoids and swelling behind the eyes. Since then, i have still experienced dizziness. I have ringing in the ears and now a clicking when i swallow or yawn. My vision has also deteriorated.. it seems hazy in poor lighting and i get starburst effects with bright lights e.g. lamposts and cars. I do not know what to do because it is horrible. My family do not really seem to understand how i feel unwell all the time and probably think i am a bit of a hypochondriac. I have not been to the GP since December because i do not see what more they can do for me. My Grandad died of a brain haemmorhage and i am worried that it may be an aneurysm or something like that, however; i have had an MRI so i do not know what it could be =(