Postpartum and period

Hi ladies, so it's been 5 weeks since I gave birth to my beautiful angel baby. I didn't bleed for too long after, Ive had nothing (discharge) the last week and a half.

Today I'm getting brown discharge. I know they say your period changes after giving birth but because I was only 21 weeks I'm not sure if it will for me?

I'm asking because prior I always had brown discharge anywhere form 3-7 days before actually starting. So could I be back to normal and about to start? I know with early delivery they say 4-6 weeks for the periods