Whew. Today is a new day. Yup, we all make mistakes during our weak moments. Brush it off and pick yourself up.
I would suggest that you change up your approach. Making it all about the OW is causing friction. You must change the focus to "US"...MDU and Mr. MDU.
For now, you do need to step back to get your equilibrium back. Take a few days away from your sitch and GAL big time over the weekend to take your mind off the convos with H.
Like Starsky, I don't think it is advisable for you to go dark at this point because of the precarious position you two are in.
In reading the phone convo last night, it came across as an interrogation to me. Not good. From this point and on, you are going have to set aside all questions, your anxieties & insecurities and focus on being light and breezy in each interaction with H.
You want to present yourself in a positive light that presents a stark contrast to the OW.
No more calls to H when you're feeling anxious and insecure for no good comes out of it for it leaves not so positive memories in H's mind. At some point, he's going to throw up his arms in the air and just walk away.
Take a long, hard look at your reactions and FIGURE out a way to get a grip on them. They alone are causing you difficulties. Yes, we all know that you are in a difficult situation with the OW moving into H's company facility ...doesn't mean you have to MAKE IT MORE difficult on top of it with your trigger-fast angry reactions.
At this point, I view it as a minor dust-up. However, I am concerned about your ongoing trigger-fast negative reactions for it will take a serious toll on H and on your M.
For now, you would want to just focus on GALing all weekend with friends, kids, and activities.