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.