Hi Nicole. Playing “slightly-wrong” notes probably means you could use some hand-setting exercises. There is a well known book of violin studies by a man named Galamian—assuming I have the spelling right. I don't know whether the book is still in print but it contained some hand-setting exercises to use each time you practice (or perform) and before playing anything else. The exercises use a lot of octaves and fifths going across strings so that any inaccuracy is very obvious. After working through the exercises for a few minutes, you are ready to play other things confident that your intonation will be correct.

I used to have a copy of the book but I may have given it to my daughter. If I can locate it, I'll try to put some of the exercises into ABC format. Don't hold your breath though. <g>

      - Mark