What causes sharp vaginal cramping? Have not had a BM in 3-4 days. Can I be constipated?? Also some pretty sharp belly button pain. Is this serious?

Constipation. Constipation can explain your symptoms. You may take a laxative like Dulcolax for the immediate issue. For the long term drink enough water so that your urine is mostly colorless, and increase your fiber intake. You may take a fiber laxative like Metamucil or increase your intake of fiber foods. Consult this site for fiber foods.http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/high-fiber-foods/art-20050948.