Period out of whack

My period was 26 days late, I have no idea why. I'm now on day 23 of my period. I've had it for nearly a month and I am so confused to why I have had it so long or why it was so late. I have irregular periods as it is and they can be up to 10 days late give or take a few days. None have ever been like this. I'm not on any birth control, I had a baby last September after 3 yrs of trying. My periods came back and were fairly regular now suddenly this. Anyone ever experience this or know what's going on? Help😬😬