Bad days

Not sure why they happen. I can't plan for them. The one constant is knowing that they will happen, but tomorrow is a new day. For me it's as if every thought I can possibly have come together like a tornado in my brain. I go from optimistic to despair all in the same breath. I just have to ride these days out, because I know a better day is on the horizon. I can't really take a picture of a bad day, but this comes close. If you're grateful for the bad days then the good days are going to seem even better, right?