I did a backbend and my stomach popped multiple time. It hurt but it's feeling a bit better. How can I make it stop hurting?

Warm compress where it hurts, rest for about a day.

Explanation:

Just like period cramps, its a muscle issue. (most likely.) It will help to heal the muscle that you most likely pulled.

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.