i thought i was getting better

hi, i am 22F, recently diagnosed with combined type adhd, ocd, depression and anxiety (quite a starter pack ik). i was on non-stimulants for about 25 days, but they were no good for me, and after consulting my doc, i was put on stimulants. for the first two days, i could concentrate on anything and everything. i was getting my work done (it was hard, i was still easily distracted, but i could avoid those distractions and prioritise my academics for the first time in my life), things were relatively better, but the voices in my head were still there.

after two days though, it has been exactly how it was when i was undiagnosed and not medicated. I can concentrate for a maximum of 15 minutes, and nothing better comes out of it. the only okay-ish thing is my sleep (getting at least 6 hours, but distorted). i have an important entrance examination in 6 days and haven't studied shit. i know i can easily qualify but for that to happen, i have to study, and for me to study, it means i either have to eliminate adhd or myself. as i do not wish to do to carry out any of the two options, i am stuck with the voices in my head getting stronger each day and i sit and stare at a wall all day long, just like that.

i have been reading camus' the myth of sisyphus and listening to my favourite band's music, and honestly, these are the only things helping me stay sane. i don't know what to do, i genuinely thought getting medicated would help me. has this happened to anybody before? if so, please tell me what you did, because honestly, i am out of ideas and my head hurts like hell. i just want to live up to my potential for once.