The things that trigger us varies widely for all of us - as unique as each one of us.

I get triggered easily by things like you name. Cannot handle disagreements with my children at all as they really are the only people in the world I truly care about (apart from a couple of close friends). I have a particular child hood memory of a friend that comes to mind on occasion that makes me sob; literally breakdown and whole body wracked by sobbing. This happened almost 40 years ago but it is as raw and painful in those moments as if it had just happened.

I find that if I just let myself feel it and allow the grief to enter for that moment, then it dissipates and I can be at peace until the next time.

I also agree that maybe you should have a med check just in case a change may help.