Sleep deprived and need to vent

My daughter is 16 weeks and she’s been going through a sleep regression for 5 weeks now. I thought we were done it at the 4 week mark cause she had 4 nights of really good sleep where she slept for over 8 hours straight in her bassinet. But the last few nights she’s been a nightmare to put down.

First off, no matter what I do I cannot get her to go to bed any earlier than 11;30pm. I’ve been trying for 2 months and nothing has worked. She will fall asleep after eating and being rocked in my arms and as soon as I put her in her bassinet she wakes up. Every. Single. Time.

We play the rock to sleep, put down, wake up, game for hours until she needs to be fed again. Then repeat.

Last night I was up with her until 4am doing this only for her to wake up at 8am.

I’m just so sleep deprived and feel so defeated and like a failure cause I can tell she’s exhausted but nothing I do works.

My husband works shift work so when hes on day shift he can’t help cause he has to go to bed early so he can wake up at 5am to go to work. And when he’s on night shift he’s not home until 3am and then goes to bed until 11am, wakes up for 3 hours then goes back to bed until he has to leave for work again. Even on the weekends he’s not a big help - when he tries to put her down, as soon as he gets frustrated he wakes me and says he can’t do it, and then he’ll go to bed.

This has just been the longest most exhausting 5 weeks of my life. She wasn’t this bad as a newborn. Doesn’t help that I’ve had a nasty head cold the last week. I think in the last 3 days I’ve gotten maybe 12 hours of sleep total. I was supposed to spend the day with my mom today and couldn’t even go because I didn’t feel safe driving the 1.5 hours each way to go see her because I’m so tired.

I love my little girl so much, I just wish I had more than my husband here for help.