13 Weeks - Not feeling any movement yet...

Ally • I'm Mom to 3 beautiful boys. I'm excited to add a 4th little BOY to our family!
I'm 13w3d and I'm not feeling any fetal movement yet.  Are any of you?  Silly, whenever I think I feel something it turns out to be gas moving around... So annoying!  I really can't remember when I started to feel my other babies during pregnancy.  I want to say 16 weeks, but I'm not sure.