Thanks for the answers, guys!
@Kagus: I'm pretty sure the only real benefit to them I noticed was, earlier on in the piece (but not so early on that they wouldn't have started taking effect) there was the odd moment where I'd pause to think, "hang on, this is a super stressful situation where I would normally be reduced to a gibbering and/or monosyllabic wreck by anxiety, and yet I'm actually holding it together! How nice," whereas my bouts of depression seemed to grow proportionally to the drop in anxiety.
Of course, as you say, keeping an accurate record of feelbads is hard work. I did try to keep a general journal for a while, which I'm sure would have helped to gain a vague idea of my mental state if I'd started it up again, but it wasn't exactly scientific.
All those weird apps for tracking mental health seem hella daunting, too, especially since they all seem to want one to dive straight into the whole meditation side of things. Yecch.
I think the main thing I was asking wasn't so much "are withdrawal symptoms gonna fuck me over entirely" since I seem to have somehow skipped those anyway (although according to my googling tonight they can take a long time depending on the person), but more... should I feel like I've let myself down by giving up on this particular avenue of potential self-improvement, even if it didn't seem to be doing a great deal?
I mean sure, a better idea would probably be to discuss trying different medications, but it takes me a lot of effort to work up the nerve to seek out any doctor interactions, let alone if the plan is to say "hey your shit ain't working for me doc, gimme something better".
How confrontational!
I really oughtta at least get back on track with my less-daunting psychologist appointments, since it's always nice to at least talk at someone even if I usually kick myself afterwards for forgetting all the important stuff, but I can't afford to pay their "missing an appointment without giving notice" fee, which I still owe from last time. Whoops, haha.
Also I gotta head to the city and buy new books for use as diaries/journals. OCD decrees that buying a different, easier-to-find book would be entirely unacceptable.
I eat mushrooms. Seems to work for me.
But wouldn't that involve having to go outside to find 'em?! Bugger that for a joke.
Seriously though I can be pretty fun guy when the fancy takes me.