Re: 17 weeks and not feeling baby ???
Most likely, it's just that your placenta is in the front this time. That can hide the movements for quite a while. I felt our first at 18 weeks and this one at 14 weeks but didn't feel our middle daughter moving at all until 22 weeks because the placenta was anterior (implanted right behind the belly button) and was hiding all her wiggles. Being heavier this time makes you likely to feel baby a little later too. No need to worry but if it would make you feel better you can always call your midwife or doctor and ask to come in for a quick heartbeat check just to reassure you.
Molly~ wife to Phil since 2005 and CDing, EBFing, semi-vaxing, babywearing, natural birthing, PT CBE, Christian SAHM to Kyra 1/2008 and Paige 3/2009
Thrilled to be PG w/ 1 more due 4/2011 and hoping for pink!