Is it normal feel bloated and have a slight lower abdominal pain a week before your period begins?

It can be: Those symptoms can be part of what is called "pms" (pre-menstrual syndrome). Sometimes the hormones you produce at that time of the month may lead to a slowing of the motility (muscle contraction) of your intestines, so there can be some mild constipation. Try to drink lots of fluids and eat a high-fiber diet fruits, vegetables, whole grains) to offset any constipation.