At home COVID test. Positive then negative

My daughter had gotten COVID from school so 2 Fridays ago I tested her at home. It was bright positive. So I took her Saturday morning along with my 3 year old to have her checked at the urgent care. She was still positive but my 3 year old and I wasn't. Well I retested on that following Monday and I was positive everyone else except my oldest daughter were negative. I've been feeling a bit off today so I took another test. It immediately came up positive. Then I took another one it was negative. So I'm like wtf is going on. So I take another one. It's negative. I'm like fuck it I take one more. It's negative. So what the hell is going on y'all? False positive? Why would it be positive? I hate these damn tests. So let me clarify I tested positive the first time on Monday August 15th.