I don't seem to ever reset from anxiety these days, unless I take meds for it; and even then, it only helps a little. For bonus points, it's become bad enough that if I'm not stressed, it stresses me; because the natural state now is that I should be anxious, so if I'm not something must be wrong.
When I relax for the first time in a long time, all of the stuff I didn't have energy to deal with previously comes back. That sounds a bit like what you described.
Also, it's a short-term solution, but relaxants can help. I know I need relatively low-strength stuff to prevent my anxiety from being set off, but getting yourself some breathing room once in a while helps. I get some flak for being a lightweight, but I can also de-stress enough to make
good better decisions. Yoga or other relaxation may or may not also work for you. Or go see great clown Pagliacci.
What I can't deal with is the self loathing. Which I think may actually be inducing the anxiety and depression that I then have to drag myself out of. Whenever something goes wrong I can't help but kick myself over it for months. There's stuff that happened last November that I'm still gnawing on. If someone asked me what I thought was good about myself, I'd be stumped because I don't think there's anything good about myself. I hate my appearance, I hate my personality, I hate my social skills, and I hate that I hate myself. I need a fucking therapist but I can either pay out of my arse for a private one (Not gonna fucking happen, I'm a jobless student) or I can wait months for a therapist on the NHS, all the while the people I'm talking to in order to try and get a therapist are going to try to convince me to go with some other method that won't work like online CBT.
Yeah, the whole being in the present and mindfulness thing isn't a good thing to do with anxiety. If the problem is over-focusing on things, you don't want to train yourself to focus even harder.
I'd recommend drugs, yoga, and/or humor for you as well.
And the thing that makes me sad right now is the Taco Bell conversation in the well-named WTF thread. Not because people are exaggerating how good/bad it is there as a joke, but because there are people who would actually defend a corporation, even ones that make money by slightly undercutting everyone else with hugely inferior products.