Is this normal?? Blood clots at 10 weeks PP

I’m 10 weeks PP and I started taking birth control 2 weeks ago and I thought I was starting my period but I’ve been noticing a couple small blood clots... I haven’t noticed any bigger than the tip of my finger but I’m wondering if this is normal??? I’m bleeding pretty heavy and it feels like I’m on my period by the cramps but I’m not sure and my doctors office won’t call back ☹️

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