Running early in the morning

Hi! I ran really early in the morning. I have to do it every weekend it's kinda boring and sometimes my head starts to hurt from the cold weather and fog. Once, I woke up at 6:30 a.m. and I my head really hurt. (Especially because we had to run 2 miles.) But, no worries...  because it's not that painful. After all, I eat breakfast AFTER running..