I can understand wanting to meet with any doctor before they do any kind of surgery, but, that said, the procedure is relatively minor (in the grand scheme of things). I wouldn't worry about
it, but, that's easy to say. I know what you mean about
forgetting to ask / mention things, or not sure they got it.
Why don't you call them back and ask if you can chat once more with the doctor, either in office or again via the phone. Just tell the receptionist or nurse that you have a few more questions / concerns for the doctor. Be sure to write them down BEFORE you call, and have them ready (the nurse will probably try and answer most of them), but if there are any unique ones he/she will at least talk to the doctor on your behalf and get back to you so either way they'll be aware.
Whatever happens, I would certainly remind them of your concerns again in person when you go in for the procedure. I'm sure it's stuff they've experienced before and can accommodate.