I'm sixteen weeks, and felt it for the first time about 10-12 days ago. Always when laying down, and not particularly frequent... and i always feel it about an inch below my belly button and 2-3 inches to the left. it sort of fells like a feather tickling put from the inside. there are so many ways i have tried to describe it... it's almost like a pattering little feeling. i was amzed to think i could feel it this early, but i'm excited to presume it so all the same! especially after reading the above post also.