Eh, its very common to get nasty after effects or even ‘long covid’, even if youre totally healthy before hand and had a mild case. Stuff like that can be a roulette, so i get his anxiety- but.

The fact that he was sick first, and is now doing this other side of the bed thing… you guys should just isolate from each other as best you can until you start testing negative, and make sure hes testing too in case he catches it. Wiping down surfaces and stuff is great, but if youre still interacting/sleeping together/ etc hes not actually reducing the risk, hes just making you feel bad. Different bedrooms (or someone sleeps on the couch) until youre better is a more reasonable solution. He could also be concerned about having to take time off work and stuff.