Thanks for the encouragement, Lea!

Nadine, I really do welcome all suggestions, but I have been trying EVERYTHING. He is in a fairly decent daily routine. He has 2-3 naps during the day, albeit short naps. I have tried understimulating, overstimulating, attending him only when he cries, filling our day with outdoors activities, having toy-free days (luckily I know loads of stories!), not letting him have any sleep during the day, not letting him feed save for 4 hour intervals, not letting him feed all morning so he gets used to hunger, feeding every 1-2 hours... and some normal days too (we tend to do a week or normal days then a couple of days of something new). I also let him fuss in his crib, he has to be crying before I'll go grab him because he does sometimes go back to sleep. I'm just at the end of my tether!