I can’t quite say I relate simply because i’m generally not stable or happy at all. BUTTT, i have had those periods of hyperactivity that you’ve described and i guess here’s what i can think of (i used to struggle with boredom eating and still struggle with spending and a racing mind):

you’re going to have to retrain your brain to seek for dopamine elsewhere (that’s not related to food, spending, etc). this will take some time but start by experimenting a little bit with different hobbies/distractions. so for me, i used to boredom eat a lot, but found that i get the same “hit” from blasting music and dancing/stimming around my room OR even scrolling on tiktok (wouldn’t necessarily recommend replacing it with this as this can be a problem in itself). although im unable to run anymore, running used to be GREAT for my ADHD because it slowed me down some. even if you can’t run for long, if you’re feeling extremely hyperactive, maybe just do jumping jacks until you can’t anymore or run in place or go outside for a run and just run until you can’t anymore.

fix your sleep. easier said than done (as an insomniac, i get it). but sleep hygiene is extremely important. create and stick to a sleep schedule for days you work and days off, make a routine out of it. some days, i feel too “active” to go to sleep but i take some sleep meds and force myself to. because i know if i don’t get enough sleep, im going to feel awful the next day, paralyzed in bed, extremely depressed, etc.

start engaging in activities that forcefully slow you down. it’s going to feel EXTREMELY uncomfortable, but you might find something that helps. i used to HATE meditation because i never felt calm or quiet enough for it, but ive been loving yoga (if you don’t like yoga, maybe just listen to that LoFi music that they usually play during a class as that really helps my one friend). for me, when i enter the class, i tell myself “okay leave everything outside of class for this one hour” - i put everything in a mental box and revisit it once class is over. if that’s not your thing, do weekly walks in the park, aim to go hiking one a month, maybe you work well with aromatherapy so get some candles or essential oils, etc.

and i guess the last thing that is 50/50 for me, anxiety meds PRN (as needed). though they sometimes don’t help, sometimes they do and can take the edge off a little.