I felt you kick

2 days ago I felt you either do a slow stretch or kick of your limb into my belly.  It was the best feeling to know that I just heard your heartbeat at my doctors appt. through a doppler sound.  Then to feel you kick was amazing!  I'm thinking because you are the fourth child, I am able to distuingish this sudden movement.  I am now heading into my 2nd trimester (13weeks) and feeling much better.  My morning sickness has eased up alot.