Ok, well I just called my vet, and unfortunately she's already left for the day. Crap. I'm getting out of work early, even- the boss said to go home since it's a holiday weekend. But we'll just keep an eye on Stewie tonight and if he starts to act like he's in major pain we'll try an emergency vet. Otherwise we'll get him to our vet first thing in the morning tomorrow. The vet assistant I talked to didn't seem too concerned since I told her he's been acting like his normal happy self besides the multiple trips to the litterbox. I'll keep you posted!