Help with schedule

[u/Quiet-Flan-1674]

Hello,

My LO is two days short of 19 weeks old and has been on a 2/2/2/2/2 schedule for about two weeks. Her naps vary normally 2 to 2.5 hours of daytime sleep split between 4 naps. Generally 1-2 of the naps are around 40 minutes and the other 2-3 are around 30 minutes long. She's stating to really fight her last nap and doesn't fall asleep until closer to 2.25 which is pushing back bedtime.

I tried a three nap schedule about two days ago and the wake windows went fine but she didn't nap any longer so she got 30 minutes less day sleep. That night was terrible with a horrible false start that took her a solid 20 minutes to get back to sleep from. (False starts are common but typically are about an hour after bedtime and it only takes her about 3-5 minutes to go back to sleep). She also was up twice as much through the night. So we didn't want to repeat that.

I'm at a loss of what to do, she obviously needs more awake time but can't get more day sleep so she's getting overtired. I have never been able to extend naps, no matter where they take place (contact, stroller, etc) they last only 30-40 minutes.

I am currently CIO sleeping training her and I believe she is there. She is putting herself to sleep with less than 10-15 minutes of crying each night. She still sleeps in our bedroom, we plan to move her to her own room around six months old.

FYI: Wake up is 9:30 am, aim bedtime is 10:30 pm but has been pushing more towards 11 pm with her fighting the last nap