Thank you Ousaima for sharing that drama!
Yes of course you had an UDIN in the airporrt, and went into sympathetic first and dorsal vagal later when things were getting hopeless. The flight back was a stress phase, the resolution came first when meeting your husband again who succeeded to awaken your ventral vagus and social engagement system. 
The diarrhea attack is a typical emergency stress reaction to relieve yourself and let go "before dying", and many know the urge during exam situations, too. In your second severe attack your nerves must have felt near death,too 
Your limbic brain saved the circumstances of the airport and travelling which made you feel stressed every time since, but obviously the stress level felt more manageable in most cases.
When working on that, you might use the META-meaning you found together with your husband in order to come back to faith in your path of life, that surrendering to this meaning  can bring us out of conflict and open us for the new and unexpected. Your guts wouldn't hold on to your ideas and expectations and "helped" you to let go of them. Being flexible and faithful in that everything will be ok would relieve your bowels from doing that for you...?
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