It sounds like a definite pattern is emerging Rahjah, and that you are doing a wonderful job responding to his cues! To those who say that babies should eat and sleep at the same time every day I say piffle, I don't eat and sleep at the same time each day by choice, so why should I expect my infant to, who is much more in tune with the calling of his most basic functions. Some people respond well to routines, others don't.

Euan is nearly 18 weeks, and is not the best at day sleeps (he's great at night though - we get 7 - 8 hours straight and have done for ages). I don't worry about when and how long, I just encourage him to sleep when he is tired - whether at home or out, he will sleep in the carrier, pram or car (and sometimes even in his cot LOL) during the day, and he goes through phases - sometimes he likes to be pushed in the pram or carried to sleep, sometimes he will self settle. As the boundaries change constantly, I don't worry about 'creating bad habits', I just do what feels right now.

It can be hard in those first few months when it feels like you'll never be able to plan anything again. I just bit the bullet and started doing stuff, and Euan generally fits in to what I am doing a lot better than I expected!

Good luck!