Help please

18 weeks old.

Day schedule is 2/2.5/2.5/2.5 with naps being 30m, 2h, 30m.

Bedtime was 7pm

Took 45 mins of check ins to fall asleep. Then we had a false start 45mins in. Ferber again took 13m to settle. Woke again at 1am for a feed and then 8 mins to sleep. Another wake at 5am but she did not go back to sleep till 6 15am and that was only for 30 mins.

She is EXHAUSTED today. I feel so fucking guilty.

But we will persevere.

Any suggestions on how to pivot naps today and bedtime?