Prominent Cisterna Magna patient

sir,30 yrs female ,i am suffering from headache in my  top skull from last 3 yrs  and now my pain is bearless, some time i used to be unconcious bec.of pain ,now recently a neuro doc had done my ct ,eeg , mri ,in mri they told that u r patient of Prominent Cisterna Magna., my doc has treated but regulary my condition are geeting worse if i used to walk 4, 5 step i suddenly gone in unconcious so i can fell any where the doc is not taking my problem seriously , and keep advicing me to be cool and calm , i don't understand what to do pls help me out , and sugges t the right treatment for it .