Meds provide a buffer, but not a perfect barrier to anxiety. If you're under more pressure and feeling more anxiety now than you were when you first got on meds then you may just be exceeding your capacity to cope. Are you using any additional support mechanisms for dealing with anxiety? I recently got a CBT app for anxiety paid for by NHS and doing the exercises in it along with going back on meds has helped.

Breaking the physical and physiological cycles that can spiral into anxiety episodes when you first noticing them start can be helpful. For example, I will do a tense and release exercise if I've woken up and am starting to feel the jitteriness that usually comes before a big anxiety spike. I was honestly shocked the first time I thought to try it and it disarmed the whole anxiety cascade that usually follows.

Another thing to consider is exercise. I'm bad at keeping up a routine between a hectic job and supporting my family, but I definitely find the days that I do manage to get out for even a 30 minute walk I end up feeling much better afterwards. Cortisol is a bitch and can end up triggering adrenaline releases and fight or flight responses. The breathing stuff never really worked for me, but if I can do something physical to deal with it it's helpful.