If you can get a test then do so but I think it is easier said than done, it does not sound like covid to me BUT I had it back in March with unrecognisable symptoms. I subsequently tested privately in May for antibodies which was positive so I knew I’d had it. My GP at the time was as much in the dark as I was, she said it was gastroenteritis I knew it wasn’t because you do not get to my age 68 without knowing a few things and I knew it wasn’t what she said, but fortunately I have a very good friend who is the senior registrar at a top London hospital and she advised me what to do. I took paracetamol, , Imodium for diorreah, milk of magnesia, seasick tablets for sickness and vertigo, antihistamines, because I had two rashes, calamine lotion on the rashes and the only thing I could keep down was the odd peanut butter on toast. Loss of smell and taste except for a nasty metallic taste in my mouth.
I did not have a cough or fever but as I get menopausal hot flushes I wouldn’t know the difference. It lasted about 10 days then suddenly I woke up one morning with a start and felt just 100% better like a weight lifting off my shoulders.