Cramping after exam

Katie • 27 years old. Me and my husband have a 4 year old and TTC #2!!
So I'll be 38 weeks tomorrow and had my appt today. Doc did a cervical exam. I'm 4 cm and 50%. I had my appt at 930 am it's 911 pm and I have had pretty consistent and bad cramping. I've never had this after a check or even after any pelvic exam or pap. Advise?