moving up in limits

[MataWispar]

I am having a problem moving up in limits I play 50nl and want to play 100. I have played tens of thousands of hands at 50 and am winning at 7ptbb/100. I have played about 6k at 100 and am loosing. I don't think its just a downswing, I don't play well. I have read many posts comparing the 2 levels and it seems fair to expect that the two aren't that different, which has been my experience. I just seem to be making bad decisions when I know I shouldn't, but I do it anyway. I just don't feel as comfortable as I do at the 50 level. Has anyone else experienced anything like this, and if so how did you deal with it?