Brain fried

I see really terrible visual snow, get like a static sounding tinnitus with this pins and needles sensation.

Its so severe - no matter what I try. IT randomly happens, I don't know what triggers it. It drowns out other things and it's impossible to even listen to something with it. IT can feel so bad Ill want to rip my skin off.

I'm so scared because it gets so unbearable I feel like I might snap. I'm getting closer and closer to breaking point.

I don't get what triggers is, I've tried different things to stop it, distractions, breathing, showers. It'll happen at different times. Different emotions.

It's not like I sit and wait for it, worry about it. But in the actual moment it's brutal. I try tell myself it's just passing but it's getting harder to do that.

Does any know what I can do, why this happens. Why