Been having stomach pain for 6 days now and unable to have a bowel movement. what could be wrong?

Abd pain: Significant constipation can cause abdominal pain. Stay well hydrated (at least 8 - 8 ounces glasses of water per day). Try to get in 5 servings of vegetables and 4 servings of fruit per day – get that fiber in. Stay physically active if possible. There are a number of over the counter laxatives that you can take now to help pass your retained fecal matter.