is it odd not to have nausea/morning sickness?

Sarah
I am 5 weeks, 6 days tomorrow and I haven't felt a bit of nausea yet. I cramp here and there, my breast tenderness has calmed down but still a little sore. It's so silly, to worry about misscarrying considering there is nothing you can do about it either way... but I can't help but wonder- is it odd to not have nausea by now?