Sounds like her meds aren't working anymore... or are only having limited effect.
Anxiety and intense emotions (especially guilt spirals) are SUPER common with adhd... it's part of the disorder... because our brain just LATCHES onto something (positive or negative) and RUNS with it. ((Also why normal punishments don't work with adhd kids... they focus on the punishment itself, instead of *why* they're being punished, and how to change)).
I strongly suspect that either puberty is hitting (aka her meds need to be bumped up or altered), or that she's put on inches and pounds and her meds just need to be upped to reflect her new height/weight, or that for no discernible / an unknown reason her meds need to be bumped up or altered (just happens sometimes, it's usually situational... like going from working to being a SAHM, or going from college to work, or dealing with a death, or, or, or... essentially our brains "need" changes which means either a different dose or a whole new med to cope with differing circimstance). ADHD meds usually have to be either bumped or altered when our body grows (add 50 lbs? meds need to be increased to be at the same "level"), or when we have hormonal changes (puberty, pregnancy, menopause).
It's REALLY common with adhd kids that one med family works prior to puberty, but that they have to switch into an entirely different family of meds once puberty hits, although *some* can just change the dose. Because brain chemistry changes as we mature, our maturing brains often need a different kind of kickstart.
R. Adhd-c mum to an adhd-c kiddo