Aborted my run after 2 miles

On Monday, I started running with the hope of doing 3+ miles, but I was tired and aborted after 2 miles. Last week was stressful, and I guess I'm not fully recovered yet. During the rest of the week, I didn't run, but I did take walks with my grandchildren who were visiting for the week, and I probably walked about 2 miles total during the week.These were slow walks that covered some distance but at a slow LSD.