< My First-Ever Mental Breakdown Is A Fantastic Learning Opportunity!
it sounds to me like you're beginning unmaksing. a small amount of weed isn't going to permanently change your neural makeup, however i find weed helps me unmask, and to me it sounds like you are going through unmasking and skill regression. it kind of sucks but also once you start understanding your brain and body better from it, it is a much better life.
you will make it out of this unstable period, stuff like hyperfocus is part of adhd, needing more energy is part of autism. with the walk you mentioned, it sounds like it provided stimulation which helped regulate your brain, i'd suggest looking for other stims that can help also. for me i quite find those squishy balls filled with smaller squishy balls really helpful for regulation. i in fact have a shark like that which joins me for my tattoo appointments because its so helpful.
i wish you luck and the knowledge that you are not alone in this, you are not the first person to experience this, and you will get through it.
weed may have not directly caused it, but it sounds like it opened a door that can't be shut, now you need to look through it. you have got this!
I suppose it could be an unmasking process- I am vaguely aware that, over the past decade or so, I've become more mature and tolerant. I think, generally, those qualities are good for me, in that they allow me to function, but I guess if I'm going full autism I may as well embrace the chaos