It's a bit early for most first-time mums, but some people do feel flutters or bubbles around that time, especially if it's not your first pregnancy. The tricky part is telling the difference between actual kicks and gas or digestion, so don't worry if you're not sure yet. Might be worth mentioning it to your doctor at your next checkup just to confirm everything is progressing well.
I also felt the movement. I’m at week 13 too! But online always say won’t feel until 16 weeks.