I felt movement with both my kids around 13 weeks. It was really slight and hard to distinguish from gas, but I was able to verify it with the doppler. Within a couple weeks of feeling the first movement, the strength and amount increased greatly.
With this one, I feel a party going on down there, so I don't know if it's baby and gas or all baby or all gas. I just know it's often. I did feel movement a week or so ago and put the doppler right where I felt it and the baby was there and then gave another thump to prove it was him/her