sophene, TIME is a big part of the process. You are early. I know it stinks. I know it hurts but turn that pain into the energy to handle this is a way that will save your MR.
Follow Sandi's rules. Not for a couple days. For as long as it takes.
Don't bring up the R, let H do it. Listen to me. It is for the greater good. It is very counter intuitive. It can work, but it takes time.
Tell him in text or any way you see fit about his S reaction. BTW, the kids are picking up on your reactions. Do it in a way that doesn't try to guilt or condemn.
Hang in there, you are not alone. TIME and any time that H gives you is a success.
M 53 W 54, M since 98 D15, D19 8/2013 discovered EA, W maintained contact with OM until 10/14 7/2/17 W said she wanted S, 7/25/17 moved out of MBR 12/17 W says moving out 5/18, W still in home.