It means you are human! And, you are one of the most patient humans I know of! So you lost your cool...hey, it happens. He's lucky you're still around to blow your top in the first place!
If you feel like you did or said anything you need to apologize for, then do so. Ask for forgiveness and then let it go. Don't get pulled down into his pity party/stay in bed until noon/game-playing "stuff." Get your groove back. Get back to GAL'ing and taking care of the kids, life in general. Try to work with the anxiety. Meditate if that helps, pray, go for a walk, read a good book, see a mindless movie, go to lunch with a girlfriend, WHATEVER works to get you through the rough moments. Re-evaluate your goals and what seems to be working/not working for you. Make the necessary changes and get back on track.
You've been doing awesome, and you will bounce back from this. As always, I got your back.
