Okay, just have to mention...
The aches and itching were probably there before. Sitting at a computer just causes a bit of aching inevitably. The human brain automatically shuts off awareness of constant sensations, such as the feeling of clothes/shoes on your skin, or the fact that you can actually see your nose all the time, in order to focus on more important and immediate tasks. It likely does the same thing with the minor aches and itches that come from sitting at a computer for prolonged periods of time. The reason you're feeling them so much now is almost certainly a psychological one, in that you're focusing and expecting to feel these sensations, so your brain pays extra attention to them.
Also, the nubs are your shoulder blades. Believe me, when I was six I reached back and thought I was sprouting wings, only to be very disappointed when someone told me the truth.
Finally... if people were sprouting wings, we would know it. I could spend five minutes in Google and probably tell you everywhere Emma Watson has been in the past week, and she's just an ordinary human. As Draak pointed out, functional wings would not be concealable in the slightest, and would draw massive amounts of attention. Combine that with the fact that everyone and their dog has a cell phone camera these days, and there's simply no way that this would be a secret.
I wish this wasn't so. I would LOVE to sprout wings and fly. This, however, is unfortunately a scam. I doubt this will change anyone's mind if you already believe that something like this will work, but I apparently can't keep my mouth shut, so there you are.
