I still get them occasionally.
I generally can process them with meditation and breathing exercises if I catch them early enough. I find the key is to recognize the onset, and rather than fight it, just get to a quiet place if at all possible, start slow breathing and try to enter a state of mindful meditation, letting the anxieties and emotional swings flow past, not engaging or fighting it, but just letting it wash over and away, letting it fade with each breath.
Unfortunately, sometimes I wait too long, or still accidentally engage, and that leads to Bad Stuff. It's really hard to get past this once I engage it in that virtual combat, which seems to make it stronger. Triggers for this appear to be from getting kicked down from multiple sources at almost the same time. When that happens, I find that I'm getting knocked down before I have recovered from the last virtual blow, and recovery on my own becomes very difficult. I've had to rely on friends to help me recover in those cases. Just choose your friends carefully, as you need folks who will really support you in bad times, not turn around and kick you themselves! Your support network should actually be supportive.
Saira and SailorMars are definitely on the right track. It ain't easy, but it is doable.