First smear - shadow on cervix, should I be worried?

Hi all

i received a letter from my GP saying it was time and I had book for a smear test. I was very nervous about this however I know how important these can be so I booked. 

Whilst I was with the nurse she asked me if I had the coil which my reply was no, so she told me that she could see something like a shadow on my cervix, this has got me really worried , should I be worried about this?

thank you in advance guys xx