My husband was sick and tested positive for COVID but I got tested twice and negative both times. Why?!

I was literally living and sleeping and kissing and etc with my husband a week before his positive test. During that week he was pretty sick but we did not think it was COVID. Sure enough it was COVID and I continued to sleep and take care of him. I tested negative 4 days after his worst symptom say and again 8 days after his worst symptom day. What in the world?! I am seriously bewildered and confused. What gives?! He was symptomatic and positive. I have no symptoms and negative tests!

Edit to add he is back at work today as it has been 11 days since his worst day. Health department guidelines