Can't stop vaping and lap tomorrow

My first lap tomorrow and I've never been this anxious before. I found out in may I have adeno endo and endometriomas.There's so many different outcomes from this surgery I have no idea what's gonna happen. Now I'm stressing out that me smoking is gonna cause complications. I'm only vaping 2% nicotine but I'm so stressed it's always in my mouth.

Can someone reassure me that I'm not going to die tomorrow because of this stupid habit. I'm freaking out.