I’ve read the book about possums approach but not super across it. Please be kind- extremely sleep deprived.

Desperately seeking advice for 6month old who consistently wakes 10-15times a night and it’s no longer sustainable.
We have tried cosleeping (bed sharing) and using co sleeper cot set up and wakes happen either way. Historically not a great sleeper- needed to sleep on someone as a newborn, always woke frequently but has gotten worse since being unwell (is fine now)

At the moment napping between 2-3 hours a day but sometimes less- like 1hr. Wakes 7-7.30, nap around 9-9.30 for half an hour- 40mins, contact naps for up to 2hrs middle of the day and then we offer a short bridging nap around 4/4.30 for 20minutes depending on the day of sleep. Bedtime varies but around 7.30. Baby only gets about 9hours of sleep overnight due to all the waking. He often seems tired when we he goes to nap and to bed at night, doesn’t take too long to get to sleep- maybe 10minutes (fed of bounced) so I don’t feel like he’s having too much sleep. Overnight wakes every 30mins to 1hr. On a good night we might get 1-3 stretches of 1.5-2hrs but this doesn’t happen often. This has been going on for 2 months, before that we had 4month sleep regression with waking every hour half of the time.

Desperately trying to find a solution as this is unsustainable. TIA