Its still only early days for me as im 15wks but im sure ive started to feel those little bubbles. I know with the other 2 it was 18 weeks before i started feeling anything and even then after that they werent huge movers till they started running out of room.
The acrobats used to start around 8pm when i finally had a chance to relax.

They reackon you should make a note of when you start feeling movement as that is a good indication that your half way through and it gives you an indication of when bub is due. If thats the case then this one is comeing 3 weeks early.