ANSWER – I might come across a bit harsh here but I think this is entirely psychosomatic. It is simply not possible to come across a book at 14 with no prior knowledge of the craft and work the kind of magic that has these long lasting physical effects. I’m not saying you are necessarily lying or that you don’t believe in the experiences you have been having but I think you have attributed your symptoms to the wrong cause.
The natural physical changes between the ages of 14 and 21 account for most of the descriptions you give. It is quite natural to grow out of the need to wear glasses and of course your sex drive will increase as you change from child to adult. Your appetite is also bound to increase during your adolescent years. Beware of trying to find a complicated explanation for natural and normal changes that would have happened anyway.
That said, the psychology of the mind is as powerful as any magic in my opinion and it is my belief you have convinced yourself that you have performed this magic to the extent where your mind is now starting to manifest some of these changes you ask about in your question. I don’t think an answer from me on a website will be sufficient to put this down and I suggest you see a professional therapist who can help you make the disassociation between your symptoms and what you believe to be the cause.