I disassociate when under pressure, like my brain just blocks everything when someone is yelling at me, or when i try to concentrate so hard and nothing makes sense, or when i have to make a quick decision, or during exams, during times of pressure or fear i disassociate and/or, imagine a happy place where i can actually do what was asked for me as well as me being like successful and stuff, like when people tell me go get that thing or do "insert simple job here" it's so hard to comprehend and understand and do, and i've been called dumb for it a few times and even people thought i did it on purpose, i have good grades at school although i do rate my intelligence below average and my comprehension is pretty low which is why i have to put in more hours into learning more than my peers, maybe if it has to do with it but i wouldn't know, it happens with my emotions sometimes, i don't feel or react late, is also included in my reaction to surprises or empathy,  and it makes people feel sad or angry because i look so displeased when I actually have no idea what to do, and when they talk to me about their problems I don't know how to act or say, and sometimed i stay very oddly calm, and i don't care or hardly do, but will gladly help in any way i can, it helps since my sister whom i love very much can't react in dire situations because she gets in her emotions and i can which ًi do have a lot of emotions tbh but it's really frustrating since i was young and recently it's been getting bad, btw sorry for bad grammer and stuff i wrote this on a whim, hope it still makes sense