Hi Adam
Please please get that appointment sorted - there is absolutely No Way Pedro you'll figure it out on your own, seriously even if you had a brain like Stephen Hawking's you couldn't. It's all fairly logical, the science - if you started off with an in depth knowledge of all the subtle nuances of every single function of every different bit of the human body and brain to start off with it would be quicker no doubt. Not normal things that most people know, though! LOL That book is excellent, so get it anyway. It's a book my clinic Nurses have on their bookshelves as it's well-used by them!
Every little thing you just wonder what why or if, meanwhile - ask us! We are NOT medical experts, but collectively do have hundreds of years experience of living with the thing! 'Somebody' is quite likely to be able to offer info about whatever, and what might help sort it.
Good luck!