I always respond to these threads and I always say the same thing so sorry for repeating myself. I have 3 sick free pregnancies, though I have suffered with headaches. Vomiting only affects 1/3 of people, so it is my no means the only pregnancy-defining symptom (although Hollywood would have you believe every woman spends her pregnancy retching down the loo).
I don't think a symptom free pregnancy is 'lucky'; it can be lonely and very worrying, especially when everyone else around you seems to be passing out or generously providing you with tales of how they were sick on the tube every two minutes. One person even told me my pregnancy was less 'viable' due to my lck of sickness.
It is simply down to how your body reacts to the hormones it produces; and you , like me, and 2/3 of pregnant women don't react with sickness.
Don't wait for it to happen, because it may well not hapopen, or you may feel very slightly nauseous, or indeed be sidetracked by the million other symptoms that are not discussed as much; headaches, constipation, depression, piles! Or you may just feel fit and well.
Either way, you are no less pregnant, feminine, healthy or normal by not having any morning sickness. all the best for your pregnancy!