K.L.
Not everyone gets morning sickness and not everyone gets it with eah pregnancy. Generally, morning sickness doesn't kick in until 7 or 8 weeks anyway. When I was pregnant with my son, I had a little nausea around 7 or 8 weeks, but that was it for morning sickness (and that may have been more nerves than anything because we were on vacation with my in-laws and were keeping the pregnancy a secret at that point).
I didn't "feel" pregnant until I got to hear the heartbeat for the first time and we started telling people (around 11 or 12 wks).
Try to relax as stress isn't good for you or the baby! :-)
Congrats!