Covid or something else?

My family got Covid on the 26th. We had fevers for about 2-3 days. Coughing, runny noses. Thought everything was good. Decided to get out of the house on the 31st and go for a walk. Stopped at a gas station to go pee.

Anyways on the night of the 31st I noticed my throat got itchy again, I had chills, and my coughing was worse. My husband said he’s been having a hard time coughing too. Now tonight my daughter is coughing and she didn’t even cough that much when she was at her sickest with Covid.

I mean I read that sometimes Covid symptoms will go away just to come back or come back worse. So now I’m wondering if this is it or something else.