Bleeding??

So I missed my birth control shot and haven't went in to take it. I'm going to go eventually and start all over but I just have one concern/question 🤔🤔🤔 so as I said before, I skipped my shit and of course my period had finally started, im late like 3 months tho on my shot, but yea, I'm bleeding not so much but it's been a week after my first period and I'm bleeding again!!! Is that normal? The blood is also dark, not heavy either. 🤔🤔 #AnswersPlease