DD didn't sleep through the night until she was 18 months old. I did the same as you, rocking, rubbing, patting, soothing, singing etc all to no avail. First it was hunger, then the dummy, then she needed changing, the variety of reasons was astounding.
DH and I finally got to breaking point around the time of her first birthday and went to the HV to ask what we should do. She referred us to a sleep clinic and suggested we leave her to cry if we didn't rush to her in the middle of the night. We did this for what felt like ages, but eventually she got used to the fact that neither one of us was going to run in there to sort her out.
Yes, she did keep us awake, but it was slightly less stressful laying in bed wide awake, than it was getting up to her and shushing etc with her.
It really worked for us, and the screaming and crying did get to be too much at times. Obviously no-one wants to hear their child screaming and getting in a state but as DH regularly mentions, if I didn't do it, I would've made a rod for my own back.
Good luck