Oh Lifeishard... HUGS to you
This breaks my heart. I'm so sorry you're going through this.
My AH was unfaithful to me too. Nothing hurts like being cheated on does... and to have to hear about it and about her from your children, oh that just makes me literally sick to my stomach. I horribly dread the day I have to deal with that...
Everyone else has given some good advice... Just give yourself time... and please be kind and gentle with yourself.
I'll be thinking of you