@Jessa85
Congratulations, you Star you! You have carried this out with dignity and aplomb. You should write an instruction manual on how to move like a ninja and pounce like a panther.
As far as you not telling him you knew about his affair when you handed him his keys and him then throwing it in your face to 'spite you', he is too stupid to realize that you want the divorce because he is a shit, not because he is a cheat. And that his little chippy is welcome to him, because you certainly don't want him.
And now, yes, rest. And if you suddenly have floods of emotions both good and bad, know that this is perfectly normal. You just have to 'ride the tide' and they'll dissipate. Lean on your mum, breathe deeply, and eat whatever sounds good to you.
There is still work to be done, but it can wait until you've caught your breath.
Peace.