Serenity, Dont worry the same thind happened to me. It still does dependiing on where he is sitting.(he can appear to go quiet for a few days,then he is back with a vengance!) I felt movement really early, like 15 wks, then nothing that I could say was definate till about 22 wks.
Bubs will be fine, the location of your placenta can muffle things a bit as well