Sleep

4 weeks has a wake window of 60-90 minutes. If they are awake to long they can get overstimulated they then become very difficult to get to sleep. My little boy is almost 6 weeks and sleeps most of the day. He’s awake from about 7am aswell I think it’s because he’s wanting to get out of bed and start his day if that makes sense. He then sleeps from about 9 he wakes on his own every 3 hours for a feed.

Hope this helps.

A newborn will sleep between 8-16 hours a day, so that’s totally normal and if they’re falling asleep while feeding they’re probably too tired to eat or they’re just not hungry enough for the whole feed. I wouldn’t size up the teet because the next size is for 2+ months and you’ll find the milk comes out too fast and too quick and it will be too much for your baby of that age to handle X

As long as he is over his birth weight I wouldnt wake him at 1pm. He must need the sleep. Waking him could be the reason he is over tired