So confused

Sam

I miscarried three weeks ago, I bled for a week stopped bleeding been TTC for two weeks everynight , Saturday afternoon I took an ovulation test to see it was positive, I read online to do it first thing in the morning so I did Sunday morning same thing positive, but two hours later I started getting pink spotting figured AF was starting two hours late no spotting later on spotting but a brown spotting, spttoing brown very very little not even enough to use a light days pad, but now I have a positive pregnancy test, could my levels still be enough three weeks later to get a positive pregnancy test? I'm so confused.