14 weeks and period like pain

Bonnie
Im currently 14 weeks 3 days and for the past two or three days ive felt mild period like back pain and cramping. No spotting. But its almost constant. Like a dull ache in my lower back. And little bit of cramping. Only on one side. Is this normal? Ive heard of round ligament pain but not sure if this is it. It literally feels so similar to period aches.