Welcome to Gaia! ::

Sadly, the costume you have so far adds up to either:
A) Mallgoth (known by others as "poseur goth")

or

B) Metalhead (with the former being more likely)

For suggestions on stuff to do for a more gothy outfit, try looking at the "Labels sticky" (for fashions of various goth scenes), or the Fashion subforum.
My first suggestion, however, is that if you want to do a gothy outfit, metal band shirts are a MAJOR no-no. The baggy pants with chains (Tripp pants) are also not going to help you much in trying to have a goth appearance.