Not nauseous? 7 weeks 5 days

CM
A bit nervous about the absence of feeling nauseous. I have had a few very brief and overwhelming puke feelings that last just a second or two and mostly after exercise. 
I have been dealing with headaches, sometimes they are so bad I almost can't work, and had crazy fatigue week 5 and 6. 
I feel mostly good but do have parts of days I just don't feel well at all and just want to curl up and relax. Mainly at night.
Any other moms to be skip nausea or have it hit you later? If so, when did it kick in? I'm crossing my fingers but don't want to assume I'm out of the woods and then have it hit me. 
Thanks!!