WTF?

Ok, so I know I just posted, but I had to rant about something else. About 2 hours ago I took some generic Tylenol Arthritis hoping it would help my hip pain, which has been making me not want to move for half the day. Since then the pain has gotten worse despite the Tylenol and trying to keep my legs extended and not cramped up, which is what usually makes things worse. I'm also feeling slightly loopy/light headed. What?! I know that traditional pain relievers don't always work for fibro, but they usually do at least a little for me. Why would it get worse? Argh, I really hope the Flexeril works tonight.