As u sad ur pain started after abdomen exercise which means either u did abdomen exercise in a wrong posture or because of over exercise. Then I will suggest you go for lower abdomen X Ray or MRI, to diagnose any internal injury. If there is no internal injury.
Next Steps
Then I will suggest you go for visceral osteopathy by Experience Physiotherapy Doctor. Then this pain can resolve.
Health Tips
Do
1 Take good amount of water
2 Coconut water which can help you release this spasm
3 take a sip of lime soda, while u r taking dinner and lunch. Because gas entrapped may cause this pain.
4 take a light meal.
Dont
1 Don't over eat
2 avoid to take a spicy food to avoid acidity
For further help
Contact me