I have to agree with Venus - there are proactive steps you can take while you wait for a diagnosis; reading diagnostic information can even increase symptoms. There are some practical things you can work on; there is a workbook on Dialectical Behavior Therapy that has exercises that would help anyone. A lot of therapy centers around cognitive or behavioral therapy. Exercises to improve positive thinking, to have more control of emotions, to be focused; you don't need a diagnosis to try those.