Paralysed by Anxiety

I’m currently lying in bed with my heart pounding. I feel like I am suffocating. I don’t really know what the best thing to do is when I experience paralysing anxiety. Do I let myself experience it? Do I try to distract myself?

I have worries in the back of my mind that I don’t really want to acknowledge because I know my anxiety will increase if I think about it. So I’m sort of just concentrating on my breathing. I know this will pass.