Okay so my MIL just brought something to my attention! After I had Justice I bled for 4 weeks. 3…

Okay so my MIL just brought something to my attention! After I had Justice I bled for 4 weeks. 3 weeks later I started spotting on Nov. 8th and started bleeding from Nov. 9th-13th. I have an app that has been accurate on my pregnancies and menstrual periods that I've been using for over 2 years now. According to the app it says I should've got my period today and I have no bleeding not even spotting a little bit! I am not on BC so obviously I know there's a chance of pregnancy and even though I'm breastfeeding I know I can still get pregnant cause I was still breastfeeding Silas when I got pregnant with Justice. But I'm not sure if the bleeding in Nov was my period returning or not and if so...Welp that's baby #3! HELP PLEASE!