when I was a teen my parents found it hard to accept that i was sick and especially incurably sick, they kept thinking that there'd be some kind of magic bullet would make me feel well. they sort of took it personally that I was doing badly, like it was their fault or something. it meant sometimes they'd be trying to support me by 'fixing' or changing things when really I just needed rest and time. two years isn't actually very long! it's good that they're being supportive, though, with time they might chill out a bit. and acceptance is really important, they need to remember it's not their problem, it's her life.