If I train within a couple hours of bed I have trouble sleeping. I will have trouble sleeping if I'm overtraining as well, but can really tell when that's the case....don't feel good at all.
As long as you're feeling good during the day I'd keep training. It may take a while for your body to get used to the changes (?). If it starts catching up with you take a break or change it to two days lifting per week to see if it makes a difference (?). Try eating a big bowl of fruit and cottage cheese or a turkey sandwich before bed. You could use the protein overnight for rebuilding muscle and some of the protiens help you sleep.
No matter what, I'd use it as an excuse to wake the wife....
