bloated and bleeding

Alexis • Mom of a little girl ❤️ Aubree Elizabeth Dellinger was born 9/1/28
Okay so my af is due the 18th. It started off as brown spotting then went to pink then to red then back to pink then brown to pink. I'm so confused. I'm not cramping. I'm bloated and my stomach hurts even after I eat. What could this be?