I think you might have to accept that for a few days, H is going to be awake at ridiculous o'clock. You're not going to be able to do this without a lot of crying, I suspect, teething or not. Would he go for the ear defenders, if you told him about it in advance? Or spend the night in your bed with DH, if that is further away/more insulated from noise? I wasn't trying to say that you're looking for excuses - on the contrary I know you're dying to fix this! - just that if we wait for a 'good' time it would probably never come, it's either teething, or a cold, or a bug, or something-or-other. You know?