Yes, this is all normal. If you want the marriage to work, you'll have to get through this. It's like a withdrawal. If he stopped seeing the OW he is having that withdrawal of not getting his "fix" from her. Could he be second guessing? Probably so, but it doesn't change anything. If he is trying to get through it, let him. Just make sure his actions continue to show you that he is working toward marriage. I'm sure it is extremely sickening and maddening, but it is what he needs to get through to make it to marriage. If he ever gets there, don't worry, he will deal with his own h*ll.
