[Celyn]

We aren't professionals so can't diagnose, but it could be related to OCD or other things such as tics. Though your best bet is to consult with your GP.

You mentioned that the breathing one started in the first lockdown and other ones have eventually fizzled out. I'm wondering if maybe stress has something to do with it? I also wonder if focusing on these behaviours may contribute towards them continuing and perhaps finding ways to distract yourself- becoming completely engaged in another activity might help you to 'forget' about them and as a result, they may eventually fizzle out.

Hope this helps a bit