I felt movement around 12 weeks even though I was pregnant with my first and everything I'd read said it was too soon.
To me, it was very, very subtle feeling. It felt almost like I was being tickled from the inside and was well below my belly button & a little to the right (turns out the baby is still a bit to the right because that's where they hear the heartbeat with doppler, where the sonogram was done, all a bit to the right, probably to do with the positioning of my uterus).
Around 18 weeks, I started to feel occasional pokes (like being poked with an index finger from the inside); around 21 weeks, good strong, occasional kicks that could be felt from the outside by my husband (but I still feel the tickling sometimes too although a bit higher up now--I'm 22 weeks).