Nello, I'm so sorry that you're suffering with this. I will tell you my story, but I'm sure others will come on and will not agree with me, you have to make your own decision in the end.
My DD was always an excellent sleeper, slept through the night from about 5 weeks, maybe that's why it was such a shock when it happened to us! She was a bit older though, about 11 months if I remember correctly.
Suddenly for no reason she started waking up and it was like you say, every couple of hours. It went on for a week and I just couldn't cope. Because she'd never been one to wake in the night, we didn't know what to do. She didn't want milk, she wouldn't take medicine and she's never had a dummy. She's always self-settled aswell but she was screaming everytime we put her in her cot!
We went to extremes to be honest, we wondered if she'd started to dislike her cot. So we moved it out and moved a travel-cot in for the short term. Made no difference.
Now my Step-MIL is a nurse and finally, at the end of my tether (and having just been diagnosed with PND), I called her. She asked what we were doing to try and settle her and we said that we'd go in, try to soothe her blah blah blah and she said, "Leave her". Well the thought horrified me. I tried to find all excuses not to do it but she said, "she's playing you, leave her".
So that night, I put DD down in her cot, she was already crying but I walked out and shut the door. I got the phone and called Step-MIL. She could hear DD crying in the background and we had the video monitor on so that we could watch her. It was horrible but Step-MIL kept me talking about other things, including my PND and after about half an hour (a long time I know), DD laid down and went to sleep. She didn't wake until 7am the next morning and was all smiles and happy which actually made me cry with relief!
The next night, she cried for about 10 minutes.
She's never had a sleepless night since