Can copper coil effect smear test?

Hi all, just looking for a little advise to (try) and put mind at ease. I'm 31 and had my 3rd smear test a few weeks ago. my previous smears have always come back normal.

on Monday I received a letter stating my most recent smear was abnormal with high grade dyskaryosis and Im booked next monday for a colposcopy.

3 years ago, after my last smear, I had a copper coil fitted. And The past year i have struggled with, what I believed to be, yeast infection. 

Has anyone with a similar experiance Have any advise? Can a copper coil or yeast infection effect cervical cells? As it seems strange I suddenly have abnormal cells. 

I have regular period and do not bleed after sex but it's worrying me and im dreading what they may tell me come Monday. 

Thanks for for your help x