Constantly worrying about my supply

Since my supply started regulating I keep freaking myself out. Thinking I’m not producing enough and my daughter isn’t getting enough, anyone else? I started to notice my boobs getting softer in between feedings around 3.5wks and I wasn’t feeling full and engorged anymore. She’ll be 5wks on Friday. I also noticed that she started not having as many poopy diapers around 4ish weeks. She went from having poop in every diaper (8-10) to having 1-2 good poop filled diapers a day and then a little bit of poop in 1-3 diapers. Still having 6-10 pee diapers. Sometimes when I’m nursing her after like 5 min she starts pulling away and relatches, comes unlatched, cries and so on. Not every time just sometimes. It’s like she’s getting irritated. I’ve read that it could be just because my letdown slowed down and it’s not coming as fast. But it still makes me nervous. (ftm) she nurses for shorter periods too. At the beginning she was nursing 20-30, now she usually only does 10-15 and seems completely content. She started sleeping longer stretches at night too. Like 4.5-5.5hrs. Will that hurt my supply? I feel like no because I want to regulate to what she needs and I don’t want oversupply. I’m always nursing on demand whenever she’s hungry, never really pump unless I’m going somewhere without her outside of “feeding times”. Sorry this is so long! Just needing some reassurance and someone telling me that they feel/felt the same way!