macbook pro battery problems

I have a 15" macbook pro that is about 9 months old right now. Very recently I noticed that the charge dropped from about 3.5 hours to about 2.5 hours and when charging it will charge normally but then literally take 1.5 hours to go from 95% to charged. Also today in class it went to sleep after it said that it had 30 minutes left. After letting it charge for almost 20 minutes, it still goes to sleep immediately if the cord is unplugged for a second. I checked the battery recall from before and although my computer is in the right time window, it wasn't recalled. Am I just expecting too much out of a 9 month old battery or is this out of the ordinary?