I've been through workplace harassment and I know how much it sucks, so you're definitely not alone. It's disappointing that your company is not taking stronger measures to defend you, as no one should be made to feel so uncomfortable or afraid at work. In my case, management didn't seem to take it seriously, and I had to be vigilant in not looking like part of the problem. The jerk eventually switched out of my department, and no one misses him. Our company has since adopted a much harsher policy regarding harassment in the workplace... a few months too late.

My suggestion would be to go directly to human resources as opposed to your direct supervisor, if you haven't already, and start a report that will be ongoing (as long as this crappy treatment continues) so that they have evidence of who said or did what and when. You are more likely to be taken seriously if they have lots of details in evidence. It's unfortunate that you have no proof of exactly who used your name on that website, as it would certainly make things easier.

Also, are you sure it wasn't someone's *really* misguided and poorly-thought-out way of "helping" you? Just saying, maybe you work with some really dense yet caring people, I don't know.

Also, definitely don't disclose your diagnoses to co-workers at this point, as a few people have already said. You must appear totally competent and give no reason for anyone to talk behind your back. From the sounds of it, these people are hoping for drama - don't let them get what they want.