Had this pain as did everyone I know who carried a baby. It's called Round Nerve Pain caused by your baby getting bigger.
Found this article for you....
"As the uterus grows during pregnancy, these ligaments stretch to accommodate that growth. ... Round ligaments can pull on nerve fibers and other structures in the pelvis. This causes sharp pain, which is short-lived and feels like a muscle spasm.Sep 10, 2014"
Im 22 weeks and I usually get pain in my stomach and on my side's specially my ribs. Usually in the evening or at night. Sometimes they get more active at night. Or maybe your baby is excited that you are eating. Lol. I'm sure it's normal.