Hello Mabel, I think you have done a very wise and strong thing by stopping all contact. The first two weeks will be the hardest. Focus on the fact that this is what you believe to be right. You are leaning on the one thing that is not going to mislead you - your own belief system. You know that your heart and your emotions are misleading and blinded right now, so acknowledge that you have those feelings, but also that you can't trust them and will not act upon them.
It's so hard because the minute you sent that email, a part of you was wanting to know what his reaction was. But you know him - you know what his reaction was. You don't need to hear it from him.
This is like going cold turkey on an addiction. At first you will think about wanting contact all the time. Then it will be several times a day. Then once or twice a day. At last there will be a day where you don't think of it once. But if you make contact now, you flush away all that good work and you're right back at the beginning again, like playing snakes and ladders.
The possibility of being with OM seems to me, reading your words, to have been an almighty distraction from something that you haven't felt ready to face - the difficulties in your relationship at home.
You have done a huge thing by putting the distraction away from yourself. That's a wonderful step - the you who did that was wise and strong. Don't let her down now by undoing that good work.
Try as best you can to focus on your partner coming home and where you go from here. Of course thoughts of the OM will creep in, but when they do, you'll have to develop a mechanism of putting them to one side to deal with later. First things first - what do you want to happen in terms of your relationship with DP. Everything else must wait until this is clarified and worked on.
Suggestion: When you feel this impulse to contact OM, you need to do something to distract you from it. Go for a walk, clean out your cupboards, dance around your sitting room with the music on full blast. Choose something that you WILL do when you get this impulse.
All strength and power to you, Mabel. I do know how hard it is to put what you believe is right before what you feel in your heart. But trust in yourself. Trust the voice that tells you what's the right thing to do in your own belief system. Because when everything else goes away, that's the person you will be left with.