16 Weeks. Waiting to feel some definite movement

TeAna

So I'm 16 weeks with di/di twins. I think I have felt some slight slight movement but can't be sure. Some times though my stomach (where the babies would be) gets tight and feels heavy for a bit. I have anterior placentas with both bubs so I know I won't feel as much as some ladies but I was just wondering if the tight feeling could be them moving around? It comes and goes throughout the day. Thanks ladies!