I am right there with you with the anxiety and the oncoming breakdown...
I'm glad that you have your sister with you. Hopefully her presence will bring a comfort and sense of peace to you. It will be easier to relax with H gone for a while.
I can't stop obsessing about OW as well. 25 has made some great posts on my page about what to do with OW thoughts, check them out- they might help you too. (too long to re-post here.) Basically, I've adopted the mantra that she isn't worth my time and efforts to think about. She is a coward and an opportunist.
I can only imagine how your heart breaks when you hear S4 talk about you and his daddy. My S6 hasn't said much, but he's knows something is different and has started acting out a school... I've tried talking to him, but he doesn't open up. In a weird way, it's good that S4 says those kinds of things and encourages a 'family hug' while H is around- he should *see* what his decision is doing to his son. The WAS has a fantasy in their head of how things will work out when they leave- when he sees S4 get upset-it's a harsh reminder that his fantasy life won't happen.
I really wish I had more to offer, unfortunately, you and I seem to be on similar paths at the moment. I know it's not much, but just know that you have a bunch of 'strangers' who are looking out for you and want to see you through this.
M-31, H-31 T-9, M-7 S-6, s-20mth sep 8/1/11 ILYNILWY 11/29/11 Creating separation papers. Discover H has feelings for BFF, she does too 1/11/12 H moves out 1.20.12