Yes, a lot of women say its like popcorn popping. Mine was like tiny thumps.
Oh nice.. haha um yeah my tummy feels like its twitching on the inside like all the time it stops for a while every now and then but i dont know if i could be 16 weeks..i have gotten my period every month but it was very late last month and it does run in my family to have a period while pregnant.. so i dont know..