Tongue-Tied

So reading has become a horrible, painful chore for me the last few months. And its killing me. It's really a chore. Even reading fun books has become very difficult for me to do. I am unable to concentrate on words and lines. I can't pronounce anything anymore yet I have to stumble through it cause the only way for me to read and have anything make sense is to read out loud but reading out loud requires pronunciation of "hard" words. I feel like I'm back in grade 4 trying to learn to read all over again. I have always been a great reader. I used to finish books in an hour and be able to remember the tiniest details, now I can't even get through a chapter and remember what was talked about. It's frustrating and it's scary and I just don't know what's wrong with me.