When do you feel baby moving?!?

Jenna • Angel Baby Dec 2013 <3 Willow Corinne Dec 2014
I am 16 weeks pregnant and I only think I've felt the baby move (I have lots of gas so it's hard to tell the difference lol) This Is baby #2 for me and with baby #1 I had no doubt and my husband could feel kicks at 17 weeks. Is placenta placement part of why you can feel it at different times with each pregnancy!? I want to feel baby :/