I have felt anxiety about pill rationing after my meds were unavailable for a while. I definitely keep a little stockpile just in case but do limit its size because like you pointed out meds expire.
Have you tried different kinds of meds? Vyvanse is more mellow as it kicks in. It’s also easier on your heart. Might be worth talking to your doctor about it, I think it also is a bit easier anxiety wise.
I don’t take my meds every day, I take them when I’m trying to get stuff done or for work. In that sense I look forward to it because working without meds is a nightmare. Wishing you luck!