confused..pregnant or not?

i took a pregnancy test on 03/6, it was a vvvvvvfl, i started bleeding from 03/7-03/16, and it was just like my period (heavy and long). i tested again today just out of curiosity expecting a negative, but it's positive and darker than before. has this happened to anyone before? i bled for 9 days but there weren't any clots. i'm also on the mini pill, i didn't stop taking it because i figured i wasn't pregnant anymore once i started having period-like bleeding. any ideas?

(mini-pill is 10 mg of progesterone only.)