Snape paced his rooms in the castle as he'd done most of the night. After Lucius had left he'd had a few more drinks and then busied himself packing for the honeymoon. That done he paced some more, then straighted his office, his storeroom, his classroom. He was going to give Minerva his keys again. Potions lessons would be suspended until he got back, so he'd given the students a massive essay to complete in his absence. He tried to sleep but didn't get more than a few hours.
Finally deciding there was nothing left to do at the school he took his bags and the hanging bag with his wedding attire and Floo'd to the manor.