One thing to be aware of is that COVID-19 seems to sometimes start with gastrointestinal symptoms before fever and coughing. Please don’t allow this information to make you hyper-anxious, since many of us often have such symptoms, but it’s something to keep in mind. Here’s a non-technical reference from TheHill.com:
Study: Nearly half of COVID-19 patients experience digestive issues
https://thehill.com/changing-a...of-covid-19-patients