Oh it's such a shock when they do this to you!

The time WILL get shorter, try to get yourself in a position where you are comfortable at least. Do you have a chair next to the cot. Do you think a CD playing gentle music in the background would help? It sounds like he is a bit overwhelmed (which can happen when they start to do something new like crawling or eating), the cuddles are too much but he still needs you there to wind him down kwim?

I dunno if this will make you feel better or not, but 40mins each night isn't too bad - I was doing it for hours....I'm only just getting my brain back now