The beginning of morning sickness?

Since like the day I found out I was pregnant (almost 4 weeks), I've been gaggy. Just kind of lightly sensitive. This past week (I am 5 weeks and 6 days) it's gotten worse a little each day. I got up to pee before bed last night and I dry heaved hard core for about 10 minutes. Then through out the day I've felt nauseated and really sensitive to my stomach but no more dry heaving. It's not quite 6 weeks yet (when they say most people start to experience it), is this the beginning of impending morning sickness or would you say I'm already there?