My employer made me sign a w-4 form and I didn’t check box 7 to be exempt and now on my w-2 they didn’t take out any taxes except Medicare and social security ..help

I was told she took out taxes and I asked her before I got hired if I had to sign a 1099 form and she told me no.. I didn’t understand why federal and state taxes weren’t taken out and I only worked for her for about 6 months only made 200 a week and on my W-2 it claims I made 7213 but how is that possible and she won’t help me she told me she did what she had to do and that’s it ...