I have some BP's that go 6 months during the breeding season without eating with no ill effects. Assist feeding at this point my cause more harm with the stress than good. Unless she gets noticeable skinny with her spine sticking out I'd just wait it out and review her habitat just in case.
I'd recommend checking out this article by John Berry that covers many reasons BP's may not eat.
http://www.worldofballpythons.com/ar...-ball-pythons/