"Off" Since Monday

Remember those headaches I was having last fall?  Well, they have been back this week.  I did run Sunday and Monday but Tuesday through yesterday I just couldn't do it.  Now, today I'm ok.  At least for today.  So I did run this morning and it felt good to be doing something again.  I had an MRI last Dec. 27th and it showed nothing. Mom thinks it's "seasonal."  Am I depressed because winter is coming?  Maybe so.  Anyway, back on track today so we'll have to see what tomorrow brings.