Period lasts less than a day?

Hey mamas,

I’m 9 months postpartum and about a month ago I started what I thought was my first pp period (my babe is EBF.) It ended up being so short, basically just one morning when I woke up, that I thought it couldn’t possibly even be a period. Than exactly 30 days later the same thing happened - was definitely light bleeding when I woke up yesterday morning but stopped completely a few hours later and today it’s like it never happened. I had very regular, predictable 7-day periods and 30 day cycles before I got pregnant so this is very strange. Has anyone else had this? Any explanations?