Thanks for the input, everyone. Apophis is definitely a male. He was probed when he was a little younger, so he is definitely not about ready to lay eggs. And if he is, I think I am going to be rich. On another site for Corn snakes, someone mentioned that they think he is overweight...and that the "swelling" is actually fat pockets that have developed.

I've set up a vet appointment for Wednesday, so hopefully I can find out what's going on with him and get it taken care of ASAP. I am continually checking on him, but he's still his usual lovable self. I'll let you all know what I find out.