You really haven't given us enough information to make much of a decision.
So a mental health professional might be helpful.
The big question is how is she doing in school. If she is not having the same problems, then you can probably eliminate your two biggest concerns. It is always possible that she has learned how to "get her way" at home. Since that usually does not work at school - it is a good comparison.
I think that you should stop focusing on a diagnose and seek mental health counseling for your daughter. If your daughter is experiencing suicidal thoughts, this is where you need to begin.
its a good age to get tested those signs could be allot of things
watch out for shrinks who want to much meds adhd most often needs meds possible counseling
but it dont need huge amounts of meds
you can check medication out on www.drugs.com