**HUG!!!** I've been there & know how heartbreaking & frustrating that is. My first few weeks with my LO was exactly like that, but, since she was preemie & jaundiced, they told me that it was what to expect & that I should wake her when she'd sleep at the breast so she would get enough nourishment. They suggested I wake her by rubbing my thumb in circular motions in her palm. Well, that didn't work, & I know it sounds horrible, but, the only thing that helped was keeping a cold drink nearby & when she'd dose off & stop eating, I'd touch that for a second against her back through the onesie & she would immediately wake & start eating again, lol. She wasn't mad unless I touched her with it too long. I didn't totally confirm to the BW & EASY plan till she was amost a month old & she could stay awake longer.
As far as once she awake & then overstimulated & wouldn't go to sleep, I got some great ideas from advise I got on these message boards & from my SIL. When I was having this problem with my DS, and the shh/pat would only make her cries escalate, I have a white noise machine that I put right up next to her cause I could "Shh" loud enough (they say you have to "shh" louder than your LO cries). So, I turned the white noise machine up as loud as it would go & while she was swaddled & on my shoulder, I put her little head near the white noise & patted her. Almost immediately, she quieted, stopped squirming & her eyes closed! I couldn't believe it!!! So, I moved the machine to a table right next to her crib & put her in it & she drifted off to sleep. It really does help to shut out the outside stimuli. If you don't have a white noise machine available to you, & want to try this anyway, you could use an AM radio on a channel that has no station (just white noise), or there was advise from another mom on here that said that when she had this problem with her LO, she took her into the bathroom & turned out the light & on the fan & that worked for her. Some people have used the vacuum cleaner or a hair dryer for the white noise affect.
It gets better, I promise! It's tough at you LO's age, but, there are some great people with great advise on these message boards, so if what I'm suggesting doesn't work for you, I'm sure someone here can help.
Good luck!