Possible UTI?

Hi - I don't know what to do.  It's 4:30 am and my little guy is in pain - do I call the vet now or wait until 8am when the office opens?

Not sure what's wrong with him - maybe a urinary tract infection.  He was a bit off when I came home from work, but went outside with me, and then when he came back in he just plunked himself down and wouldn't move around.  Seemed better around 11pm so I thought I'd wait until morning and take him to the vet first thing... but now he's obviously in pain...

I just saw this - I'm sorry you didn't get a reply. You must have felt so helpess with your cat in pain in the middle of the night. What turned out to be the problem? I hope your baby is feeling better now.