Sounds like the pains I had around that time. They told me it was ligament pain from stretching. If your worried you can call your doc but they won't send you to l&d until 20w.
If you're really concerned call your doctor or l&d and they could tell you if its a concern to go in or not
Even if it's just on one side? its nothing unbearable but I can tell its there. And my stomach feels very tight
Sounds like growing pains but if its unbearable pain the call ur doctor