Okay help!

I’m five months PP, and the first three periods were on time all about 28 days within each other, then my fourth period was 9 days late with no spotting. Okay so, I’m now five days late on my period once again, And I had 9 days of spotting that stopped last Friday which was the day I was supposed to start. I have no clue what the hell is going on with me. I had a csection, and also had my tubes tied so I only have like 1% chance of being pregnant. I just want to know about anyone else’s experiences with this. Thanks!