Falling backwards sensation in back of head?

It's my main symptom other than that I'm ok, I basically get a sensation in the back bottom of my head, like its tilting/falling backwards, it feel like it spreads to my neck and top of back, it comes and goes once a day and lasts a few hours, is it all just anxiety, or something worse?

that happens to me, but it feels like it tilts forward instead. i still dont know what it is though.

I've constantly got a dropping feeling asif I'm falling and something in my head feels it moves up and down fast like a bouncy ball I feel I'm swaying all over even though I'm still

Yeah that sounds exactly like it, do you know the cause?