Braining has worked for me: poking a toothpick through the eye socket of the mouse, then squeeze a little so that brains come out. Gross, but snakes love the smell. After braining the mouse, I just kinda bump the snake in the mouth with the mouse until the snake gets irritated and strikes. Or starts mouthing the mouse.
But, different things work for different snakes...
Have you tried offering her pinkies again? Since she ate those once, she might eat those again.
But, remember that adult corns can go a long time without eating. So far she has gone less than a month, and I bet she can survive at least another couple of months.
If she is acting weak, she might have something medically wrong with her. You may want to take her to a vet if you are concerned. But, if you think she is alright medically, just continue to offer her food at regular intervals (remember not to offer food too often)