Was this coronavirus and are my family safe now?

an

I started getting coronavirus symptoms on 15th July, with elevated temperature, body aches and pains, fatigue, dizziness and just generally felt absolutely crap. I never felt that ill in such a long time. I had a covid test on the second day of my symptoms which came back negative. It probably was another virus but I work in healthcare and I unavoidably went into a packed out supermarket the week before. It is now day 14 since my symptoms began, and touch wood, my family are OK. So if I did have it, does this mean my family and I can come out of quarantine? We still quarantined even though my test came back neg due to my symptoms. I am still feeling tired and achy but I no longer have a fever. Touch wood!