False positives

Has anyone ever had false positives on pregnancy tests? I'm shocked I was on BC (mini pill) took it religiously. & I got 2 super dark positives and I'm like 5 days late. The last week I've been SUPER nauseous, no puking just never feel good like I'm going to puke. boobs sensitive, headaches, tired, can't sleep, but all things I get around period times but no regular cramps just a little 1 here and there. I'm like still shocked. But happy ☺💗💙