Start over or Just Fix?! Help!

So long story short instead of doing my hair myself I decided to be lazy and went to a salon. Not only were the colors wrong, the woman apparently didn't know what ombre was, but on top of that she didn't bleach all of my hair like I asked! After getting home I found alot of my hair was still brown when it shouldn't be. Instead of getting the courage to go back I decided to just fix it myself. I bleached the obviously brown parts and added my own color to get it the right shade on the parts that had been bleached. I wasn't able to get all the brown though because it's hard doing the back side of my hair and it's pretty much just all mixed into my hair now. There aren't large brown parts but strips here and there and strands of hair everywhere. My question is should I try to pick out the brown and bleach just it or should I start from scratch and bleach all of my hair to make sure I get all of it? I'd hate to lose the progress on the parts that are actually okay but I was thinking of redoing the colors anyways. Any help is really appreciated!