I'm not doing well at all.

I have given it some thought, and I am having second thoughts about the revision plan that the doctor came up with. Of course, I put down my credit card and scheduled thinking I was 100% confident, only to realize later that I have other concerns and questions that I didn't even get to ask at my visit!
The lady who schedules pre-op appointments will be out for 2 weeks. At least I bought myself time so to speak by having the surgery at the end of April. I literally worked myself up into getting a panic attack. What if I decide to back out indefinitely? I'm having reservations about it, unless he can meet me in the middle where the procedure isn't going to be more risky than it is worth. When he went over the advantages, disadvantages, and options to the procedure, now I am thinking about the potential disadvantages and questioning everything.
I hope they'd be able to give my money back until I make a decision at a later time. I'm so upset with myself. I need to get in to see him, but won't even be able to do that until the lady who makes the appointments comes back from vacation.
How can I try to cope until then?