Well, the only time I can could say I've had sensory overload in so many terms is when I'm in a large group of people, like a LARGE group of people, so it doesn't happen often at all. It needs to be noisy, like a concert or something like that, and it needs to be crowded. The first time I remember experiencing anything like that was going to festival-type thing thrown at school, where there were just crowds upon crowds of people talking loudly and acting up. I liked the sensation, I guess I mainly got light-headed.
But plenty of sensations just irk me. Sounds and smells and some textures. If it doesn't stop or I don't manage to somehow tune it done/out, it can make me pretty angry.
Ah, fire alarms....fire alarms are the only things that have ever caused me to panic. It feels like panic, like fear. As a child I was terrified of dying in a fire, I had nightmares about fires, I didn't like the fireplace at my grandma's at all.
A couple years ago my husband decided to make toast at like 2am when I was fast asleep which set of the fire alarm. I remember dreaming 'I need to scream. No, I need to be louder!'. Then I was suddenly awake and screaming...I was probably louder than the friggin alarm. I bolted and ran into the bathroom and cowered into the corner like my dog used to do when the smoke detector went off. I had turned completely white and it took me at least 5 minutes to recover.
I'm not sure I'd classify any of these experiences, except the large, noisy crowds one, as sensory overload. Sensory irritation and a really strong sense of alarms bringing terror. I don't even like alarm clock alarms, gotta be the radio if I use one, although I can get used to them.
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Not autistic, I think
Prone to depression
Have celiac disease
Poor motivation