Irregular period

[Rhoda04]

I used to have a 5day period before I had my baby. Got the first period when she was 5months old now she is 8months old.But I've noticed since that it's been shortened to 3days since I started again. I was supposed to see it yesterday and it was just a drop and it stopped since then! Any ideas pls?? I'm freaking out here! I've been having safe sex since so pregnancy is out of it!!! At least that's what I think!

Thanks