Mini pill users.

Hey guys! So I'm pregnant with baby 3 and considering using the mini pill after she is born for birth control. Anyone here use it? Did you gain extra weight? What were your side effects? Love it? Hate it? 
I really want to get another iud but I got pregnant on my first one and when I went to get the second taken out to start trying again it was already halfway out.. So clearly not for me.