There is a doubt that i might have crohn's disease, but there was no clinical complaint such as diarrhea, i was constipated also, is this possible?

Yes: Depending on where crohn's is presenting (small vs large intestine) and what type (fibrostenotic vs fistulizing), constipation can be a presenting symptom. That is why your doctor will need to put all the information (clinical history , physical exam, lab work, imaging studies and endoscopic results) together before making a diagnosis of crohn's.