What worked for us, after 2 years of waking at least every 2 hours at night and crap day sleeps. Was eliminating food additives from mine and DSs diets. He now only wakes once at night maybe twice but is so much easier to get back to sleep. So much better than between 6 and 12 wakes each night! Only needs a feed on one wake up and will usually find me and just needs to know I'm there (we co-sleep) and he goes off to sleep on his own.

I hope you find something that works for you soon. The sleep deprivation nearly killed me, I really know how you feel
Sorry to hijack, but I have to ask, how long did it take to see results? I've started the same thing with my DS a couple of weeks ago, but this last week I've been bad with my diet so I need to restart it all.

OP, I so feel for you. I have no advice, just plenty of hugs because my 12month old DS is also super wakeful at night. He has woken every 1-2 hours for six months, and in the last couple of weeks his day sleeps have been catnaps and i cant resettle him.
your definitely not alone, I hope you find something that works soon!