L.J.
I went/am going through this with my 3 year old daughter- she goes through spurts of wet nights then no accidents for a while. I did notice it started when we started to talk about her starting pre-school and talk of a new baby coming. Have there been any recent changes in your son's life? I haven't turned to diapers because I know she is capable of sleeping through the night without them. I recently purchased a waterproof pad that goes on top of her sheets so if she does wet the bed I don't have to change her entire bed in the middle of the night. I don't have any advice that will solve the problem, just letting you know that you are not alone! Hang in there!!!