Applying a heating pad or hot water bottle to your stomach can help relieve constipation and help you poop.
The way the heating pad or hot water bottle helps you poop is that the heat helps to relax your muscles in your abdomen which then helps you poop.
You can sleep with a heating pad or hot water bottle on your stomach overnight and by the next morning you should be able to poop.
If you're still constipated you can try Castor Oil or eating some prunes which can help get your bowels moving.
Taking some Epsom Salt by ingesting it mixed in some water can also get your bowels moving within 30 minutes to an hour or even soaking in an Epsom Salt bath can help relieve constipation.