3 week old waking every morning hours now🤷🏻‍♀️

My son was sleeping in 3.5 hr stretches now he’s back to getting up at just under two hours. He will be 4 weeks tomorrow. Falls asleep at the bottle during the night so maybe because he’s not finishing his bottles? Like everyone else I’m exhausted..just looking for opinions if this sounds common for this point in time at the 3-4 week mark. Thanks