Does it help if I say, I could have written your post 8 months ago? I am so sorry you are having a hard time but I promise IT DOES get better, a whole lot better! My DS was THE WORST napper, he wouldn't nap, when he did he would nap for 45 mins at the most and night time was a shocker. I would pat/shhhhh for what was hours each day only to have him scream and scream.
8 months on and I have a gorgeous Son who sleeps beautifully at night, has to be woken from naps and is a delight (for the most part) to have around.
I felt desperate (DH and I were just talking tonight about my lowest day) on many occasions, but the thing is to hang in there. If you need to take a break from BWing, then do, if you have people around you, USE THEM to take a break, if you can get away from your DS for even an hour to focus on you and not him, then do. Sometimes I found it easier to just get on with things and to not obsess - easier said than done
Hang in there, it really does get easier. One thing that dawned on me one day was to use the book as a guide not a bible as this caused me no end of stress - always feeling like a failure cause my DS wouldn;t do it 'by the book'. Do it your way, but use the BW techniques as a guide.
If you want to chat just PM me, I lived a similar nightmare and survived - my DS is 1 on Sunday so I am looking back and patting myself on the back for surviving :-) :-) :-) ;-)