At 5 weeks, I think my LO was doing 20min naps. Lol. It was terrible. Pretty similar to what you’re describing. She fed every hour too. Recently at night (3 months old), she would wake up every 40 minutes. That was pure torture. And she refuses the bottle, so I need to latch her on. It’s gradually getting better 😴😴. Hang in there, mummy!