It looks like you really hate this job. "I feel pain everyday I want to go to work" is not a healthy way to feel. It seems to me that the only correct answer is to take another job.
There's no worse hell than spending 1/3 of your life doing something you hate, and spending 1/3 of it dreading that soon you have to go back soon. (The other 1/3 is sleeping). It just wasn't a good fit, that comes with the territory of hiring. They'll understand.
It's really honorable of you to consider the company's time/money/feelings, but sticking around will just be delaying the inevitable and making yourself (more) miserable.
There's no worse hell than spending 1/3 of your life doing something you hate, and spending 1/3 of it dreading that soon you have to go back soon. (The other 1/3 is sleeping). It just wasn't a good fit, that comes with the territory of hiring. They'll understand.
It's really honorable of you to consider the company's time/money/feelings, but sticking around will just be delaying the inevitable and making yourself (more) miserable.