What are some things you eat or drink to make you poop?

I suffer from chronic constipation. It has gotten so bad to where laxatives and stool softeners are not working. I have started to modify my diet because it was definitely an unhealthy diet, but I'm not sure what to eat or drink to make me poop. The one healthy thing I have always stuck to is water since I was a baby. When I have told my doctor about this, she kind of blows me off and keeps telling me to try stool softeners.