Dude, Brad, welcome! Have you tried revisiting some of your old childhood favorites? I used to be really into the Animorphs for example. They are short and there are many of them. Or you know... maybe try something on the mature end of the spectrum? ;-]
If pain is causing the problems focusing then your reading will likely follow a similar curve. But as for reading as a skill, once you do it consistently then I am certain your speed will pick up. But really, just chill. If I were you, I'd be loading up on that herbal goodness (depending on what state you live in) and reading all the manga I wanted. Don't be hard on yourself, read what you enjoy. It's not like it is for school and you aren't being graded
If you are bored, come hang out in the Lounge with us. It is a great way to build community and it is really just a bunch of silly nonsense.
*starts a chant going*
ONE OF US! ONE OF US! ONE OF US! ONE OF US! ONE OF US! ONE OF US!