To preface this, I've had some previous bad experiences with illness, hospitals etc and I guess I'm still affected by it. Health is definitely one of my main anxiety issues.

So, I've got what I presume is a common "head cold" that badly affects my sinuses, ear canals etc. I feel like my head is a giant balloon about to explode. Everything is swollen, congested and horrible, I can't breathe properly and it just sucks. 
Being the super anxious, hypochondriac POS I am, this has made me insanely stressed and I can't stop thinking things like "what if I never get well?" Or "what if it's actually covid and I'm going to die a terrible, slow death?"
It sounds ridiculous but it makes me feel claustrophobic and trapped in my own body. I dont know what to do. Im basically just pacing around the house now because I'm too anxious to sit still.