That is what I felt (I'm only 2 weeks out so I still remember it vividly). I have had anxiety/panic disorder for the last 20 years give or take, so I kind of knew what to expect. In my case, I asked the anesthesiologist beforehand if I could take Xanax before I arrived at the facility, to which they told me I could, so long as I took it 2 hours before my arrival time. Doing so made the pre-knocked-out part 1 million times better than normal for me.
Otherwise, I would try to distract yourself and do some fun things that you won't be able to do for the first couple of weeks. Take a walk, country drive, go boating, go to the movies... basically anything that you enjoy that will not cause you to get "hurt" (Allergies, etc.) before the surgery.
I'm sure everything will go fine, but I will pray for you tonight!