Help help help

Hi ladies!! I last had sex on May 9th. I’ve been taking a birth control pill for almost a year and a half now. Last Thursday, I forgot to take a pill so I doubled up on Friday. On Saturday, I woke up to spotting. Like brownish-black clots and a little runny at times. Since then, I still am having a little here and there. As of right now I’m cramping. Mostly that sticky clotty stuff. I doubled up again on my pill today (I forgot of course to take it yesterday) I have about 9 days left until my next period. Thoughts? I’ve also never spotted before, is this normal? Should I be worried?