Hydrate with as much fluids and lots of rest, that’s pretty much all that you can do unfortunately since you have already caught covid.
Sorry that you’re not feeling so good. I am sure you must be worried. Some mummies have shared before that they are raw manuka honey when pregnant with covid and drank water with lemon. Since you are visiting the GP, perhaps ask him whether he thinks both those home treatment are suited for you?
Also most of these mummies have now delivered their babies and babies are all good 👍