8 month sleep regression

My LO will not sleep at night. He was up 5 times last night and whatever I do, I can’t get him to go back to bed. He won’t nurse back to bed. He won’t co-sleep. He will only go to sleep when my husband (but not me!) bounces him on the yoga ball. I’m about to LOSE IT.

I’m doing all the right things for his sleep. Blackout curtains, white noise, appropriate naps/wake windows, good bedtime routine/time. Room is the right temperature. Sleep sack.

My husband is against sleep training so I don’t know what to do. I’m a different, scary, angry person when I’m sleep deprived overnight and I find myself thinking I wish I could just let my baby cry himself to sleep because I’m so sick of the wake ups and trying to get him back to sleep. I’m lucky if I can get a 2.5 hour stretch of sleep overnight and sometimes he is awake for 1-2 hours at a time.

We live thousands of miles from our family and because of covid I have 0 support. I don’t know what to do.

Does anyone have any tips to get baby back to sleep in a regression?

*update* my husband does help overnight. We’ve been splitting the wake ups. However, every time my son is up I wake up too and sometimes I can’t go back to sleep until after he is asleep. I also can’t nap during the day. My body physically won’t let me most days.