If it makes you feel any better, I had my last check at 13 weeks, midwife measured me as 14 weeks (but adjusted down to 13 again due to it being 2nd pg), couldn't find the heartbeat with the doppler ... on top of me looking more like I'm 10 weeks pregnant (some seriously stubborn abdominal muscles!!) and not feeling any movements (after being under the impression that next-timers feel movement so much sooner than first pgs!). I'm not having u/s's, either, so I've got nothing to go on except the MW telling me it's normal and me just hoping it's normal until and unless it's not!
As it seems to be so common, I feel better since reading everyone else's replies, too