I didn't manage to go for a walk but did manage to avoid the urge to bring up potential infidelity, which is the only thing on my mind at the minute. At work till late tonight but going to try again today to go for a walk.
It can be difficult to motivate yourself when feeling sad, depressed, fearful, spinning due to your sitch, but one of the best things you can do is get active. Make sure you get out for that walk today. And then tomorrow. And then the next day...