Skin breakout- please help!!

IzzyLightwood2k17

Im 18 yr old female who havent had pimples for a long time. I wash my face daily.
But this week I have really watched my intake and done everything properly eating
the right foods, and my face has had a huge break out and i have pimples all
over my chin and lower half of my face. My mum thinks this is because since iv only
ate healthy this past 7 days that its like my body pushing out all the bad stuff, but
i would like another oppinion thanks