Acid Relfux/Constipation Tips?

We went to the doctor today and found out my 3 1/2 week old has some acid reflux. Doctor said to do things like prop her up after eating, burp her every ounce... things like that.

Anyone have any other suggestions they have had help?

Also, after feeding today her stomach got HUGE and she struggled for about 30 minutes trying to poop. She finally did, but do you think there is anything we can give her to help? Tummy tickles helped a little, but nothing else. Maybe a formula for gas or some drops?