gingerbreadslice, here is a way to help yourself.
Take a deep breath (or as deep as you can manage), hold it in while you count to five, and then breathe out again. Do this five times.
Then take a deep breath, count to five, and as you breath out try to cough.
Do this twice.
Then lie down on your front on your bed for ten minutes, breathing as deeply as you can, counting while you breathe in and breathe out. If you can manage breathe in for a count of five, hold for five, breathe out for five, hold for five and then repeat, that's terrific. If you can gradually increase the counts to six, seven, and so on as far as ten, you are doing a breathing exercise which will be invaluable if you actually do catch neocoronavirus and get it badly enough to notice (those tests from Germany suggest that it's really pretty likely that you won't notice!) because it clears your lungs and makes them more efficient, and that is what you need if you get a respiratory disease.
Even if it is very difficult at first, it is worthwhile both physically and because you have to concentrate to get it right, and if you are concentrating on that, you won't be thinking about the other things that threaten to overwhelm you.