You are not the first one nor the last one to be mis-diagnosed. I had a classmate who had a person try to give her a personality disorder to turn out to have no disorder (I think). She ended up having a Christian counselor set her straight. I would probably want to try to find a good counselor who is open to re-thinking a diagnosis. If a counselor/psychiatrist isn't open to the possibility of a mistaken diagnosis, I would be uncomfortable with that person. We are all humans and when a counselor/psychiatrist makes a diagnosis, it is based on talk. "Manic-like episodes that are clearly caused by somatic antidepressant treatment (eg.,medication,electroconvulsive therapy, light therapy) should not count toward a diagnosis of Bipolar I Disorder. (DSM-IV-TR) I am not a counselor nor do I play one on tv. However, it sounds like you are describing this. I think a good counselor should consider this in making any diagnosis and treatment decisions.
I hope you find a counselor who will listen to your concern and be open to this possibillity.