Take a week off and get up to go back to work in the morning. Slowly. Very slowly.
But I fixed at least one bug today. I think I fixed another massively complex bug, but I discovered that something that someone has checked in prevents me from building the software. I have now sent a message out looking for help, as it looks like there are missing files that weren't added to the VOB somehow.
Maybe by morning, they'll sort it out.