Breathing and relaxation techniques during a C-Section?

I felt like I couldn't breathe with my 1st c-section and ended up having a panic attack, my heart rate went through the roof, and it ended with general anesthesia. I am due with my 2nd in a few months and I'm hoping to stay calm and learn how to breath properly and relax so I don't have general anesthesia again. Any other tips for getting through the OR smoothly this time?