Well I just go with the flow - I never do anything to stand out because I don't like standing out, and I've got enough self-awareness to make sure I don't. I never have looked Autistic.
Only one time when an ambulance was coming towards me flashing it's lights but no siren, and I knew that blue flashing lights on an ambulance means the siren could go off at any minute, and I started to panic because I absolutely loathe sudden loud noise near me. So, as a last resort, I had to put my fingers in my ears. There was no-one else around, and I'm sure the ambulance drivers didn't really see. But usually in this situation, I get out my mobile phone and pretend to be on it, holding it right against my ear, and holding my finger in my other ear (I've seen people do that when on their phone to block out background noises).
I don't go out looking different. I don't wear earplugs or sunglasses indoors (actually I've seen people wearing sunglasses in shops when it's a hot sunny day outside and they don't bother taking them off. But you know what I mean). I wear fashionable clothes that make me blend in, and I have a nice handbag over my shoulder, and I always keep my hygiene in good condition. So I look like a female of my age (which is what I want - I don't want to look old or like a kid or like a man).
I don't think I ever look weird. I think, if anything, I look stupid (to other people). I seem to have this expression on my face what looks like I'll put up with everything without thinking or feeling anything - when actually I'm the opposite inside. I'm an agitated, anxious person inside who is a little too self-aware and too worried of what everybody's thinking of me. So that is why when I do show any sign of negative emotion, I get people looking at me like I've got 2 heads.
Otherwise, I don't see how somebody can suspect Autism in me. I often get people pulling up near me in their car and asking me for directions of somewhere. If I looked really weird, I don't think they'll bother to ask me. That's what my dad pointed out (he's often pulled up to ask somebody for directions, but he says he never asks people who look a bit weird or something). Also people often make friendly small talk with me in the bus station, and I always get people sitting next to me on the bus, even when there's a couple of other seats left. So nobody avoids me.
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Female