Can a hacker find out I'm the anonymous asker on ask.fm?

I asked a couple questions to a friend and i don't want her to find out its me. I used my iphone and i switched my phone off. She hired a hacker to find out. And i don't know what to do? How do i prevent someone from finding out Help!

It's more likely that you might have said something in your questions that would tell her the asker is someone who knows her personally.