How did you make it? Don't know if it was the same race, but I heard on the news that the high temp caused most runners to not participate this time.
Trying to stop thoughts about what your H is doing on weekends, may be a tough challenge, but I'll pass along what I've read that some found a level of success. It's kind of like the rubber band on your wrist and snapping it when your mind goes down a unwanted path (which doesn't work for me....the rubber band popping method). Whenever your thoughts wonder about H's activities, put your hand up in front of your face (really or mentally) in the "police officer's stop position. Then you give yourself a pep talk about your determination, your strategies, goals for the weekend, and that you don't have time, nor allow yourself to give him/or OW your thoughts and/or fretting about something you have no control over. Then get very busy at something you do have control over right then.
May sound silly, but it does work with many people.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!