IP regarding MC, when you did it maybe your H was still in love with OW, so it wouldn't have been worth anything or maybe he doesn't want to be told that he has a problem. I went to MC with STBXH but he was with OW so had no intention to deal with his own issues! At the beginning of our separation he started to see IC but it only lasted 2 months. You can make your H go it has to come from him.
Look after yourself and your kids is all the best you can do at the moment. Thinking of you my friend :-)