Little late on the response, hope you are still even checking this post.
I had some issues recently as I quit taking drugs and changed my diet. There are a few things you can do to help.
1. An enema. Go to the store and buy one or get a friend/parent to get it for you if you are embarrassed. Its just fluid with a minor lubricant which may help you. All you gotta do is follow the instructions...lube tip...insert in rectum....squeeze bottle till its all in there.. hold.....relax. It cured me in about 5 min.
2. Mild Laxative. There are teas and other minor ones that wont cause cramping. Even stool softeners work but take a little time.
3. Coffee does it for me every time!
4. Dont sit on the pot too long. That can lead to hemorrhoids.
5. Keep moving around and drinking LOTS of water.
6. Fiber...
The list goes on.