Period postpartum

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So I need advice. I use to have a very regular period before I got pregnant and afterwards (while breastfeeding) I got my period about 3 months pp. but the weird thing was I got it twice in one month. My OBGYN said it was a blood clot that didn’t pass when I had my baby but I’m not sure that’s what happened since I got my period twice in April again. I set up an appointment with my doctor but has this happened to anybody else?