hi there I will see what I can do for you.
I was wondering a couple of things, waht is his routine like, and how is he with solids.
What I found with my dd is that we have her on an EAEASY routine, by that I mean that she E-solids or bottle, A-plays, E-whichever she did not have at the last feed,A- some more play, and S-sleep.
My dd is also teething and I have found her to need a longer wind down time, I guesss due to the discomfort she is in.
So for example, she can be awake for 3hrs in total, but when she reaches 2.5hrs, I pick her up, start to snuggle with her and wind down, and usually by the 3hr mark she is ready to go down on her own or, as I have been slipping lately, she falls asleep on me before I get a chance to put her down.
I think if you tackle the routine in the day then you may find that it will in turn after maybe a week or so, will most probably affect the night time wakings too.
I hoope that this helps you out somewhat, let me know if you need any more ideas.
Good luck hun, keep a log of what you do if you need to, it will work itself out if you stick to it...it will get better,oh! and one more thing, I make sure my dh is on in everything to do with dd's routine, that way there is no conflict in what goes on with her....