Blepharoplasty and endoscopic eye lift

I am a 21 year old girl who is unhappy with the lowness of my brow and excess skin on my eyes. I have been for a couple of consultations in the Beverly hills area and want to go ahead with the procedure... Im starting to get really panicky because my surgery date is next week, i am scared i will have a reaction to anesthesia `(which i have never been under) and im worried i could go blind or die... Im seriously scared and i keep seeing signs not to get it done, i dont want to risk my life but on the other hand how likely is it bearing in mind its a very over qualified surgeon plus i am healthy with all my tests and ekgs are perfect,     Thank you