Wonky period!!

Help!! So I've been on birth control for years now, and more specifically I've been taking Reclipsen for over two years now. My periods are typically heavy the 2nd day. They've been lasting about 3 days for a few months now but the last couple of months they're SO spotty and light....and late by about 2-3 days. What is going on?! Is my body just re-acclimating to my pill or what?!