Sorry to hear that Ama!
After trying to level my resto sham and disc priest(level 74 and 72 respectively) I have looked through the normal healing mods.
I have tried to utilize two mostly, grid(which I use on all my toons anyway), and then healbot.
I disliked healbot because in order to see anything on it, I had to scale it up and it covered way more of my screen than I was comfortable with.
Also the whole clicking thing, and watching healbot made me actually tunnel vision, which I never did with grid.
If you have a bad addons setup, you can certainly impede your ability to heal well!