The dreaded extended holiday but feelin' sick blues....

So, here it is a nice four day holiday for me and I'm sick...again. This happened in November over Veteran's day which was another four day holiday and here it is again.   It started coming on Tuesday and by Tuesday night I couldn't sleep due to the congestion, labored breathing, yucky stuff in the throat, the works.  Wednesday morning I got up, struggled to work, and after two hours threw in the towel and went home.  That night was another struggle to sleep and Thursday morning I felt that I should really stay in bed but once again off to work I went.  By that afternoon I was running a fever and sweat was pouring off my forehead.  My co-workers told me I really didn't look well and should go home but I had my first class of my next five-week master's session starting that night so I stuck it out and went to class.  I was so hot and apparently so fevered that my glasses were fogging up and the sweat was pooling below my eyes and running down my face so that I had to constantly mop up the sweat.  No one wanted to sit near me for some reason.  Friday I was in a daze and Saturday was better but not even at 50% strength.  Today I'm about 85% and by Labor day I'll probably be 95% and ready to go back to work.  What happened to the holiday?