I started feeling mine at 14 weeks, I am super sensitive for some reason to feeling them. Even in 2nd and 3rd pregnancies the earliest you can feel movement is 14 weeks the baby isn't big enough until then to start feeling them. Women may say they feel them earlier but they aren't feeling movement, there have been many studies where they used ultrasound to watch for fetal movement (no monitor was shown to the expecting mothers) and they showed that the expectant mothers were saying they were feeling movement when there was none happening. Also the baby does not have any joints in order to kick you at 12 weeks. It is very exciting when you can feel them move though.
Its always exciting feel'n that 1st flutter!&&i def think u felt sumthin,,i'm 14weeks&&felt my 1st kicks jus last week!