Almost 6 weeks postpartum, blood started this morning. Is this my period?

I will be 6 weeks postpartum on Wednesday. I havent bled for about 2-3 weeks until this morning. I woke up and I felt a rush of blood come out. I went to the bathroom and it looked like i had started my period. There was not mucus from postpartum and just looked like the start of a normal period.

I’ve looked online and I’ve read that some can begin within 6 weeks after baby. Is this normal?? How soon did you start your period after birth?