My daughter did the exact same... She use to sleep all night when a few months old, then gradually got worse, till the point of about 10months old she nursed during the night every hour!!! We got ourselves in a rut of me feeding her to sleep and then putting her down, so when she woke again after she realised I put her down the process started again
one day I just said enough was enough... I bought some MAM bottles and gave her milk in it, that was the first time she took a bottle.
At bedtime I kept to a strict routine, upto bed bottle of milk, stories... Night light on and I would kiss her goodnight and walk out. The 1st 4 nights were horrendous!!! She screamed the house down and I felt horrible. But I know her cries and isn't because she hurt herself, or she was hungry... She was just shouting at me for leaving her and not nursing to sleep.
After those 4 nights, she was a gem... Since then, she goes to bed with her bottle of milk, she's wide awake, we read stories and she falls asleep herself...
It took about 2 days for my milk to disappear, I just left them we'll alone, didn't touch, didn't express. Just tried to forget about them
As for in the beginning... The 3rd day was the worst for me!!! My milk came in well and truly and I was sooo engorged that my little one couldnt get a good mouthful, so she nursed on the very very end ***ouch*** so then my nips were cracked and bleeding. I went to boots as soon as it opened and bought lansinoh lanolin!! That stuff is worth it's weight in gold!... I found it a breeze, but found it impossible when I tried with second son..
I'm hoping to feed number 4 myself again as it's sooo easy and cost effective