I’m scared

Hi everyone I don’t know if many of you have experience this before idk but I’m a first time mommy... I give birth may 16 of this year and my postpartum bleeding stopped 3 weeks ago and I started bleeding the 16 of this month and stopped the 26 of this month but it started again the 27 and stopped the 28 of this month I have an appointment scheduled for Tomorrow the 28 but I’m so scared of a have a blood cloth of something in there causing this or something worse