I know this post is a couple days old but... Thought I'd give it a shot.
Honestly, I just try not to think about my emotional state in the moment. As long as I acknowledge the negative feeling and let said feeling remain as a feeling— not turning it into an articulated thought— and go about my day anyway, the emotions start to subside. Let your body act, but refrain from mulling over the act you're about to make.
It takes practice to not judge the emotion, but once you get the hang of it I'd say it's hard to stop.
I find that most of the time my emotions become unbearable is because I begin to rationalize them. (And to attempt rationalizing an emotion is inherently an irrational act.) Does that make sense?
Another way I like to think about it is, don't intellectualize your faith into doubt without understanding that you can intellectualize your doubt into faith.
Sorry, I know it's convoluted. I can try providing an example of my experience with this if you'd like. Overall it is about mindfulness and patience with yourself. But first, it's going to be about having a hell of a lot of patience. Hope this helps.
Stop and pay attention to what your body is feeling when you have these sensations. Notice the feeling, acknowledge it, verbalize it, accept it. Let your body feel and process it instead of fighting or distracting yourself. Let it happen until your body experiences it and it subsides. This is about retraining your central nervous system system.
There are a ton of methods and theories that fall under a heading of somatic healing…dealing with your body as it holds these things.
This happens to me often and boy is it intense! For me... I just acknowledge that I am having a moment... it's like waiting for a train to pass. Some trains are short and other trains are longer.
For the long train, I sometimes will go grab me something to drink and maybe grab a snack and go read a chapter or two out of a book that I enjoy.
If you have a companion or close friend or family member that understands your condition, go tell them that you are having a moment. Sometimes my girlfriend helps me through it by letting me tell her what part of the movie is playing. That seems to help a lot but if nobody is around, I just try to get comfortable and I verbally assault the air around me until it's I feel better but that's not healthy, I just don't know how to fix it.