my mind went to a dark place today for the first time

Assalamu alaikum, everyone. my exam results are about to come out soon. i really dream of becoming a doctor, in sha Allah, and i want to go to a good university abroad. then i started thinking... what if i don't get the marks i need? what if i'm stuck living with my difficult parents for another whole year, feeling like a failure with nothing to do? that thought hit me so hard, i genuinely felt like i wouldn't want to live anymore. i know that sounds scary, but it's true. before, when i got sad, i used to wish for the pain to stop, not my whole existence, ya know? but today was different. i actually thought about ways i could end things. i'm really scared by that. please, i beg you, make dua for me that i pass my exams, get into university on my first try, and even get all top marks in my predicted grades. i know Allah is the best of planners, and He says that with hardship comes ease, but right now i honestly can't see a future if i don't get in. i feel bad asking for so much, but isn't Allah capable of everything? He can make it happen, right?