I'm in a similar situation. I find that it's best - cliche as it sounds - to continue with my psychiatrist to combat my issues so that I don't go back once more. If you feel suicidal, tell them so, but don't mentioned plans. Feeling suicidal is, in their eyes, much different from having a plan and method. Downplay it, but mention it enough to where they understand that you do need the help - assuming you're in therapy.