Yepp, I go through this too. :/ I've been missing more work than I should be due to my day starting off badly (my job starts at 6:30am and I wake up at 4:30am, so it can be a challenge to force myself up).
I posted on the board about this and someone replied that they don't allow themselves to really think when they first wake up, otherwise the depressing thoughts would become overwhelming.
So I tried that on Monday and Tuesday, and it actually helped! As soon as the alarm went off I jumped into the shower before my mind could even begin to think. Before I knew it, my shower was over and it wasn't as bad as I thought it would be.
Another thing that helps is taking things one task at a time rather than thinking of everything I need to do.
I'm still struggling with this daily though, including days off, so would also love to see other replies.