<human>: Can you summarize the given text in a few sentences?

Hey, /r/running! I have a question that I cant seem to find an answer to searching around the internet, and I know someone out there has had this issue as well! I ran a half marathon last Saturday that I was, admittedly, not prepared for.  This was my second half in a couple of weeks and was nursing a right knee injury when I ran the second one.  I know... not smart.  Live and learn, I guess.  So, I ended up feeling the pain in my right knee build at about mile 5, so there was a lot of walking that ensued.  I ended up limp running that last 2 or 3 miles to the finish and then walked, stretched, and hit up a hot tub.  
The next day, and still today, there is serious tightness behind my LEFT knee that is causing pain just while walking or standing.  I've been serious about self massage (lol) and stretching, along with a couple of good soaks.  Nothing seems to be working, and I'm starting to think that I will be screwed for this weekends Bay To Breakers 10 miler in San Francisco... Any ideas or suggestions?
<bot>: Right knee hurt on a half, limp ran the last few miles, right knee feels fine now but my left knee hurts like hell and is very tight behind my knee.