Fiona, it is so tiring in those early days with a new baby

Babies that young have very tiny tummies. Usually they have one period of longer sleep - eg 4 - 5 hours - at that age, and the rest of the time the feeds are closer together. This sounds like the pattern that your little one has atm. After his sleep from 10pm to 2am he doesn't want another longer sleep yet. This is very normal although obviously hard for you. Perhaps you could try walking him around in a sling for a little while to see if that helps him to settle more quickly? Or sometimes mums find a warm bath can work well.

In the meantime, it is important to look after yourself and rest when you can. If you have anyone who can look after him for a couple of hours during the day sometimes so you can get a nap, that might be helpful. Or at least rest while he has his 40min sleep. I wonder if you've tried co-sleeping to see if that helps him settle more quickly also?