9 week old suddenly crying more

Is this just the 6-8 weeks fussiness showing up a bit later? She started getting noticeably fussier after 8 weeks, and now at 9 weeks i’d def be saying it might be colic but isn’t a bit late for that to start?

Her crying also always clearly seemed to be either poop or gas related but now that’s less clear. She will start screaming out of nowhere. All soothing fails for a while and then suddenly something works and she stops.

Maybe it’s overstimulation or overtiredness? She gets between 12-16 hours of sleep depending on the day. Overnight sleep is great, naps are a struggle. She almost always cries in the afternoon and is calm by the evening, but she also cries in the morning and before noon most days. The afternoon crying isn’t really worse so idk if it’s fully overtiredness.

I don’t really know if i’m looking for a solution bc i feel like nothing really works with these baby issues, i’m more just hoping someone will be like, yes this was us, and it improved by 10 weeks lol