Beyond exhausted- help!

I went back to work yesterday. My 12 week old is still sleeping horribly. He is a good sized boy, 13 lb at his 2 month appt.

He does not sleep.

I've tried BFing, formula, bath before bed, white noise, dockatot, merlin's magic suit.

He falls asleep and sleeps for about 10 minutes. I rock him back to sleep. This happens about 8x. Then he'll finally sleep for maybe an hour. Then at midnight he is up until the wee hours. I have to be at work at 5:30 am so I get up at 4. Husband let me sleep in the other room 12-4 last night but said he is exhausted because baby was up all night. He goes to work at 3:30 and comes home at midnight on two days and the works 7:30 til 4 on two days. So we are both stressed about not sleeping and having to work. I know my husband probably didn't realize how stressful it was while I was on leave because I would let him sleep in the other room.

I don't know what to so. I am going to have an anxiety attack. Please offer tips or suggestions. 😭😭😭