Period or implantation bleeding

I had light bleeding for 4 days around the time I was shouts have my period it was mainly light red and brown but sometimes it was darker with clots. It only filled one pad throughout the whole time, most of it came out when I wiped. I also just got on a new type of birth control, this kind has 7 placebo pills instead of 4. And it’s my first period on the new type. I’ve also had a tension headache for the past few days but it might just be a cold🤷🏼‍♀️ help please!!!

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