I Have Been Going To Bed And When I Lay

I have been going to bed and when I lay down I get this humming in my ears and I know when this happens I am about to go into where I can't move, talk open my eyes. I fight to try and shake my head to get my out of the state and I finally am able to shake out of it. But I lay back down about to fall asleep and it happens again. Totally terrifying and I don't want to fall asleep again. During this time it is so scary, I feel as if I am going to have a heart attack. The minute I lay down and my ears start thumping I know this is going to happen. The next day I have anxiety the whole day. Please help