13+5 weeks and already feeling something 🥺

Now I don’t know if am going crazy, but I think I just felt some flutters on my right side. I say this because it’s my first pregnancy, and I’ve read I wont be able to feel anything until about 18-20 weeks the earliest. Now why am I feeling flutters lol. Has any of you ladies felt early flutters in your first pregnancy or is that not possible??