Sounds like round ligament pain. There are ligaments that are attached to your groin and uterus and as your uterus grows it can stretch those ligaments and cause some pain. I have had it with both pregnancies and as long as it goes away quickly you should be fine. If it lasts longer than a few minutes or up to a day you can call your provider. I ended up with a cyst this time which I thought started out as RLP.
i didn't think it was ligament pain, it seem sharper then all the other times I felt it. More or less was like sharp cramping.