I feel the same way. I was diagnosed in 2006 and still don't feel like I'm truly BP. I've been doing extremely well while taking LTH, Lamictal, and Wellbutrin. I cannot shake the idea that I'm not BP. My therapist asked me if I thought I were BP and I said no. She said she didn't either. When I told my BP group therapist what my therapist told me, the group therapist asked me if my therapist has ever seen me off of medication. Most of the time I'm pretty "normal" but I'm currently experiencing really stressful times and as a result I'm demonstrating behaviors that have me questioning myself. I attribute my behavior and feelings to the stressors happening in my life. But I feel like my actions are very much out of character from who I really am. I feel that I'm out of control and that is frustrating. I also feel that "normal" people feel and experience what I'm going through. Sometimes I feel I'm in denial and other times I feel like like I'm being very truthful and realistic with myself. So I really understand how you feel. The resident therapist that I had before my current therapist, suggested that I was Borderline. I participated in DBT which was very helpful. Sometimes I feel like I have characteristics of both disorders but at the sometime I don't feel like I'm truly neither. Oh well!