Thanks, ladies! Helpful to have your thoughts on this. I will do just that--I agree, he probably is just getting too full on solids. I have probably gotten a little over-zealous relative to reccos for his age. I was trying to be encouraging, but i don't want to deny him the nutrition in the milk! Good reality check!
Milk is right away after nap--either bottle with nanny or breast with me. He should still be sleepy, but I'll be sure we don't even take him out of his bedroom and feed right away after waking.
Also, I didn't realize the age of self weaning, so you're probably right there. I will carry on trying!!