Could Cramps In The Pelvic Region Be Due To Abdominal Workouts?

I recently started working out...I ve been lifting both free weights and machine weights. I alternate my days as suggested by my trainer. I ve also have been doing some ab workouts once again on alternating days. Lately I ve been feeling cramps in my pelvic region. They feel like cramps but I know that they aren t. Could I have possibly injured myself?