Congrats on your new little one!
On Friday, my cat seemed to be in pain. I thought it was his arthritis and I gave him a little pain medicine prescribed by the vet. It helped and he is no longer limping or crying, but he's barely eaten all weekend and hasn't used his litter box (or gone anywhere else) and has done nothing but lie on my bed at night and my couch during the day. He loathes the vet here and goes ballistic to the point of having to be sedated when we visit, but I will take him anyway if this keeps up.