Im having an operation soon Im so scared if I wake up halfway through it its on my back im scared help!?

I have really bad curvature of the spine and Im having an operation on it where they cut my back open im 13 years old and Im apsolutely terrified! Please help me what if i wake up halfway through it?! Please if you guys have any experience with operations I need your advice to reassure me:( Thanks guys:) xxxxxxx