What's the Likelihood

Whats the likelihood of getting a false positive pregnancy test??
I’d be about 3w 3d now
I have a almost 3 month old :sweat_smile:
I’ve already called the Dr to make an apt. I’m just wondering if maybe it’s still hormones from my previous pregnancy or if it’s been long enough that it would be new hormoens at this point. (I’m about 10 weeks PP)