Like TLight I've found that stigmatising myself is a struggle, in my case the greatest struggle. When I've let other people know they've generally been pretty great- or tried to be (often people have no idea what to do).
I have the greatest respect for the medical system now, my GP and especially psychiatrist have been fantastic and treated me like a competent, intelligent human who happens to be dealing with some challenging stuff.
Telling my mum was pretty stressful, and intially she tried to dismiss what was happening "everyone gets anxious," but she's been supportive and not invasive (not asking me questions), and now I can sleep at the sometimes weird times I need to without having to justify myself when I visit.
The hardest have been romantic partners- none of them have reacted horribly, and to give them credit they've all tried. But- finding the balance between them not really understanding that things like me getting to bed early are REALLY REALLY important, or advising me "just don't think about it" (meant kindly, but frustrating), and them taking it really really really seriously, where they're afraid that they'll break me, is tough. I hate the 'tragic eyes' look. I don't see myself as a horrific bundle of wounds, and I don't want to be treated that way. But, I do have symptoms that I need to explain before they happen (because I can't speak or communicate when I dissociate severely) so figuring out that balance is still tricky. I don't know if that counts as stigma or not, but I definitely always fear telling, and don't want to be seen as damaged, or as someone "with baggage" or "issues." At least I know what I'm dealing with.
While individually people in my life have been clear that they still respect me, and don't think less of me knowing what I live with (and in some cases that they think more highly of me), the random comments from people who don't know, or forget still get me. For example, a friend recently was saying that dating someone with a mental illness is clearly a no-no. It's the stuff like that that people say, and I think - and generally don't say - do you realise you're talking about me?
I'm sure if I challenged them they'd say "no, not you, of course not, but these other people, people who aren't getting treated, or who have schizophrenia, or , or." Sometimes I'm tempted to get a t-shirt that says "this is what crazy looks like" (playing on the feminist t-shirt). To say- I am "one of those people" that you talk about as though I'm not in the room. And I'm not dangerous, and I'm well-educated, and I'm pretty, and I come from a good family, and I grew up in the suburbs, and I'm SOMEONE YOU KNOW. Maybe that's what's so threatening, I'm not who they think they're talking about. I never thought this would happen to me, but it did, and it could happen to you. And, in a nutshell, that's pretty threatening.