You're Steve Harrington's twin, and you get migraines. Bad ones too, of course, not as bad as your brother (ahem ahem, head trauma), but bad. And on one of Robin's trips to your parents house to take care of Steve since your parents are grade-A assholes, she finds out you probably need help too

"Hey dingus, where's other Harrington?" she asks Steve. He weakly points to your room and burrows under the covers. As she goes to politely berate you for not helping Steve, she finds you in bed "oh"