I think most testing protocols require two negative tests spaced 4-7 days
The good news is that we know quite a few families in your age range that have had a covid case. It is usually the father who gets it from work. In our social circle, the wife/kids have not gotten covid when the father isolates in the house. Hopefully, you just have the fever for 2-3 days and then are on the road to recovery. Good luck.