Stressful situations can bring out emotions we normally keep under control. Also, situations that make us feel helpless and unable to control can also do this.
MS is a pretty uncontrollable disease and tends to show itself during the most inopportune times.
Shadiyah, maybe it's time to talk to your Neuro about AD's. Something to calm you down and take the edge off.
Doydie, trying to reason with a dementia patient is stressful enough. Taking what they say and do to heart is worse. She won't even remember it the next day......and you'll be playing it over and over again in your mind. I remember this with my Mom. It's so hard to realize when it's happening. We just want them to be like we remember them being.