Sweetie, you have stumbled into a place where we ABSOLUTELY understand your irritation and sympathize and have spent a whole lot of time feeling it too. Please don't worry. And treat yourself to some cuddle time with the puppy tonight.
This mental trick worked for me when I needed to stay in control and I really wasn't: imagine a place inside of your heart where your distress about your AH lives. Okay, there it is. It isn't a good place to be. So, right now you are going to go someplace else. (I visualized a red room with a huge lock on the door, and I would lock it, promise to come back, stick the key in my pocket and walk off.) The pain isn't gone; it is still real and it will have to be dealt with. But it's locked away so it doesn't get in the way so much.
Hope it helps