in absence of an MRI, I can only go on my symptoms. I'm scared that it's chiari or a vascular malformation most of all, but I guess it could be anything.

Basically it started last march after working on cars, laying on concrete and putting my head in all sorts of awkward positions. Soon after I had panic attack symptoms; trouble breathing and feeling like I was going to spasm out.. no neck feelings like today however..
Anyhow that whole ordeal came and went, although I'd have spells of feeling random body twitches under my skin and feeling on edge, and sometimes even having twitches.
In february I got intense vertigo twice over five days, which followed up with 2 months of intense chronic dizziness. Shortly after, I started feeling very strange feelings in my neck at the skull/neck area - the atlas bone more or less.. It's stayed with me and seems to be worse now.
It's a pressure sensation but not quite; feels like something is getting impinged. I also feel pain pretty much constantly in the area, and it alternates between the left or right side of the neck.
when I lay down i get get high pressure fluid flow sensations when i lay on my side, which last for a few seconds along with intense discomfort. I also get a high pitched sound... it makes my eyes flutter.. also feeling very fatigued when i move my limbs..
I should add that my doc put me on linsinopril however, which might be contributing to that at least.

Anyhow it's driving me insane, and I'm hoping I can get an MRI of my brain soon, although i think I need cervical neck as well.
I'm missing some other symptoms though.. As I said before however, the V maneuver doesn't really induce any pain.. moving my head up and down seems to make me very light headed however.. I'm always scared that 'the event' will come that will take me out