Hi TJ, it does sound like you've been through a really hard week
And glad you're going to be back on your meds!! But at least now you know they're doing something, right? And even if it proves it would be better to change them for something else at some point at least they're doing something for now.
Nothing wrong at all with asking your pdoc for a bit more information/explanation as to why they're prescribing what they are and any longer term plans they may have, though.
It should be recognised that people should/need to be involved in any "treatment plans" (I'm sure I've picked that up from somewhere official but can't remember where!! ).
The prescribing at a whim though, maybe that's sometimes around different pdocs having or hearing about different success rates with different medications??? Which will of course depend on who they've seen/prescribed for.............and they should change medications as needed depending on how well they work/don't work anyway.
The work thing though.............maybe you could negotiate a staged return for when you're ready (!!) e.g. starting with a few hours a week??? And an action plan for how it's going to go e.g. you'll meet with your manager weekly for a review and to discuss any extra support you might need???

And for how your work was before........well very clear extenuating circumstances there!!! And your manager and you, together, should really be looking at the "bigger picture".........including when you were doing well too.
So deep breathes, hey??
It should be around what's best for you and supporting you!!

Alison