Knee Problems

I've been running every other day.  I decided to take an extra day off as my left knee has been bothering me.  I ran my usual 4.2 miles on Sunday, but it wasn't a very good run.  My knee is still bothering me today, so my plan is to use the elliptical in my basement for a few days of low impact aerobic exercise.  Hopefully this will give my knee a little time to calm down and stop hurting.  My coach advises ice and ibuprofen after running, but it's a little late now.  I will certainly take his advice after my next run.  Cross your fingers this works!