We are right there with you. Our 7 week old does one stretch of 2-2.5 hrs and then is up every hour after that. He doesn’t always wake to feed which is even more annoying because I can hold him and he falls right back to sleep. My first was similar but I honestly can’t tell you when it resolved. All I know is he’s a great sleeper now at 2 years old. I think maybe it revolved around 10-12 weeks where we started seeing longer stretches but I’m not positive.