2OC you need to find an outlet for that anger, hurt and pain. What you have been through this last month is an accelerated burn of what most here have taken months.
Please find a way to get her out of there tonight. Try capture that calm that you had earlier. Go to her and tell her, "If you have any respect for my feelings please pack yourself an overnight bag and leave me alone for a few days so I can decide what I'm going to do about you. I don't care where you go or what you do. Right now I cannot stand to see you in front of me. Please leave. Now."
If she refuses then walk out. Do not pack anything. Take the car and get out of there. Find a hotel or motel and book yourself in for three days. (It must be private.) Switch off your cellphone. Call in sick for work and take a time-out for yourself. You're going to need to grieve for a while. Don't hold back your tears.
Call someone close to you, whom you can trust to keep your location secret, for support.
You're a strong man and I admire how you've held yourself together so far. Let the shock fade so you can regather your thoughts and think rationally again. Although it doesn't seem like it at the moment, this too shall pass.
I wish you well.
M:11 | T:12 | Status: Married 4C's of WAS communication: Cool, Calm, Collected and CONFIDENT