I was first incorrectly diagnosed as bipolar II before we determined that I had AS. However, the misdiagnosis was primarily due to the fact that I would talk non-stop about my focused interest and that I had typical Aspie insomnia... Insomnia and talkativeness equals hypomania to the average psych doc. Add my irritability from too much stimuli and it became a sure thing in their eyes. Never mind that I had only one had a good mood last longer than six days in my life and that I had no depressive periods at all... and that whatever state I was in, I was in pretty much 24/7 and I did NOT have mood fluctuations.
Anyway, I was put on meds to treat bipolar which did absolutley nothing, but to cut to the chase, although my symptoms could certainly be mistaken for bipolar II, meltdowns are very different. Even a series of meltdowns over a short period of time is nothing like bipolar disorder... at least in any way that the criteria defines it. Now, non-autistic people have meltdowns and so you may certainly have them, but they do not mean that you have Asperger's.
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"If you can't call someone else an idiot, then you are obviously not very good at what you do."