Covid and symptoms help

Tested positive for covid on Tuesday. First time having covid so I’m not sure what to expect. The headache/body aches and fever are gone. Just feeling more of cold symptoms now. This morning and I woke up and my chest feels really tight and I’m a little lightheaded. I know this is a typical symptom but when should I worry? I’m trying to rest as much as possible but I have my 2 year old home as I didn’t want to expose daycare.