Butterfly, biminiblue spoke the truth about recovery and how feelings come in waves. I always want to believe that progress is linear, too, and that once I start to feel better, I'll only continue to get better and never slip back. It looks more like the outline of a mountain range at first, I think--all jagged and up and down.
Be patient w/yourself. You didn't get to the place you were at overnight, and your healing won't come overnight either. Real recovery takes both time and effort. You can just work hard, but it takes time for the changes to sink in and become part of you. You can just wait for time to pass, but w/o work, you'll be the same person w/the same problems in 1, 5, or 10 years.
Keep reading, growing, learning. And as time goes by, you'll start to see that you have more good days than bad. Really and truly, you will.