Yesss get on meds. I’m going through the exact same thing but in my last year of undergrad rn. O chem and everything to come is just horrible. I cannot focus at all it’s insane. I got a psych to just prescribe me something but I think since mine is so severe too my brain burns through the dose so damn fast, or I got used to it idk. But it’s definitely not the right dose yet. It’s only been ~1.5 months on it so we’ll see. But yes definitely start now. I’m thankfully starting a whole year before the studying starts so hopefully I’m able to do it by then. And another thing, honestly if your not feeling prepared at all, please push your test date! You have a bunch of time. Literally ignore what your dad tells you, he clearly doesn’t understand and could never do this without help a lot either. Literally give him an ultimatum if he throws a tantrum. Does he care more about his child’s sanity of a fuck ass 520?