Congrats on the 10lbs! I weigh 150lbs at 5'10" and have to eat at least 2600 just to keep my weight. I definately don't think, as I'm sure many will agree, that you're not eating enough. I would slowly increase the cals each day until you get to somewhere around in the lower 2000's. I can't tell you exactly where because everybody is different, but I definately think it would be beneficial.