Hi i am 29yrs old i have pain around my navel and stomach i did exercise, do you it could be sore? i don't feel nausea

Yes: But r/o appendicitis or acute abdomen if symptoms persist or increase.

You may have a small: Hernia. I wouldn't worry too much if it passes and is non tender to touch. If there isa hernia and bowel pops through and gets strangulated u get sick and that's a problem. It sounds ok, if we all went in for soreness there would be no one around to work and healthcare would go through the roof. Low probability of an issue.