Meadow, what are you doing to take care of yourself? Are you eating well (not saying no donuts btw lol) just make sure you are eating a well balanced diet. Sleep, ensure you get lots of sleep. What are you doing to lighten your load, can you take a couple of days off work, have a long weekend?
Have you been binging netflix or ordering movies you want to see, getting your nails done, going for walks? Have you attended Al-Anon?
Remember HALT - Hungry, Angry, Lonely, Tired - when you are feeling that anger etc - it can be a good idea to check those things and address them as you need to.
I ask because you are no doubt carrying a whole bunch of anger, disappointment and hurt around and with no place to diffuse that or vent it, it remains and that probably explains your reaction today.
Post more too if you want!