Why do things look worse, bleak, sadder in the early hours of the morning, as opposed to when the sun is up?

Was an ass to my T but she's still willing to make time for me this morning.  I'm afraid it may not go well.  Or more likely, that I won't believe her.

I'll probably keep pushing and pushing until she finally throws in the towel.

I was feeling better yesterday but it didn't stop me from being a jerk to her.