the same situation was with me continuously working 4 days on his project not slept really well . but thanks i completed one hour ago..some buyer are totally confused what they looking for.so you need to sort it out by questing her.ask her what the exact things she want to revise find out where is a problem area and work on it .
the problem was that with my buyer ,he was new and order first time so he was unfamiliar with the system how fiverr UI works and done above 15 modification request . he was confused ,and every revisions he made was totally different from previous one
thank you