constant abdomial pain

Hi, over the past week I've been experiencing constant abdominal pain. It feels like constipation or a menstrual cramp (mid to lower abdomen). The pain comes and goes during the day but it's usually more frequent during the morning. My vowel movements are regular and haven't changed since the pain began. Sometimes the pain makes me run to the bathroom thinking that I might have a diarreah, but nothing happens and there are no other specific symptoms. When should I consider looking for medical asistance? Thank you.