that feeling that something isn't quite right

Do you ever have that feeling--you can't put your finger on it--but deep down in your gut you just know that something isn't right?  It just hit me today when I woke up.  Not sure why.  Overall, I had a great day.  They boys and I went to Topeka to get Tanner some new baseball pants and other gear.  Made a stop at Target and Sam's, then grabbed them some McDonald's for the ride home.  Did a load of laundry and relaxed this afternoon.  Delivered some Scentsy.  Went to Neosho Rapids for a ballgame--and they won!  Yay boys!  Then to a friend's house afterwards to visit and let the kids play.  GREAT DAY.  So, why do I have that feeling?  Who knows.  But I sure hope it goes away, quickly.