Hi Ladies!
I am SO glad I've stumbled across this thread!
DS#2 turned one on the 25th of July and he is waking stacks in the night as well.
He isn't quite walking (alone) yet but we bought him a Little Tykes walking toy for his birthday and he cruises around the house for ages during the day so I suspect some of the waking is developmentally based.
I still feed during the night but starting last night DH has been re-settling some thus cutting the night feeds down to bedtime, around 1am, and then early morning (between 5am and 6am) which is helping me not feel so tired.
When DS#2 wakes at around the 1am mark I take him in to bed with me/us (DH doesn't sleep much either and is usually still up working as he runs his own business), feed him and then that is usually when we get our longest stretch of sleep which can be anywhere from 3-5 hours and is basically what is keeping me sane at the moment.
I keep a sleep log/journal which some would say is crazy and futile as it would perhaps have me too focused on the lack of sleep but I find it actually helps as I can often see patterns that I wouldn't otherwise notice such as teething or illness or growth spurts. I keep track of the time he slept, how he fell asleep, where he slept, and then have a column for notes like whether he is hot/cold, seems scared, etc.

I guess really all we can do is support each other and remind each other that this is normal.

DS#1 was a horrible sleeper as well and suddenly started sleeping through the night just a week or two shy of his 3rd birthday and we didn't change a thing so it was BIG proof that they will sleep when they are ready.

I did also want to add that when I was going through all this with DS#1 I night weaned him at about 14 months hoping that would make a difference and it didn't help at all so not sure when I'll fully night wean DS#2!

I am going to keep a close eye on this thread!

Thanks for the support and encouragement!!