The short answer
Yes, mild cramping is normal. As the pregnancy sac grows, the uterus and the ligaments holding it stretch, causing period-like aches. You can mention it at your next routine visit. Seek care promptly for severe or one-sided pain, pain with heavy bleeding, shoulder-tip pain or dizziness, which can signal an ectopic pregnancy.
Answered by Dami Women's Clinic (다미산부인과의원), Yeouido, Seoul · Dr. Ko Sang-hyun, OB/GYN. General information, not a diagnosis. Emergencies in Korea: call 119. Medical disclaimer · International Patient Center