My girlfriend got upset and criticized me when I woke her up with my smoking.
What is it that made her so upset?
She hates smoking and thinks it's bad for my health.
I understand that you feel upset with being criticized, but your girlfriend is concerned for your health. Smoking is very bad for your health and you should seriously consider quitting. It acceptable for a partner to be concerned about another partners health.
I'm going to show her, and I'm going to continue smoking and show her that I'm stress free.
It's nice of her to want you to be healthier. Quitting smoking is difficult but it's worth it. And it sounds like your relationship would improve, too.