Would you take IUD or use contraceptive pills to help not have your endometrial line thickened? Or would you prefer to use other types of methods to help this?

I rarely get my period on my own and usually need the help of Provera to make them start. I have started a new diet to lose weight as I’ve recently been diagnosed with NAFLD at 1 months postpartum. I am hoping this helps get my periods too but I am sceptical as I used to struggle with my periods even when I was normal weight. Just looking for advice how I can help my periods become regular to avoid endometrial thickness