3rd visit to colposcopy

feb 2012 i had a smear which had to be repeated in july 2012 the results came back as CIN1 i was referred to Colposcopy 

in october 2012 they said things were the same and to come back in 6 months time. in april 2013 i went to Colposcopy again

they said cervix looked really healthy and did a smear but not to worry. a week or so later i had a letter saying i had borderline

changes, i was so confused that after being told i was ok to have to return to colposcopy again, the letter said i have to have

a punch biopsy. im so confused i could cry. has this happened to anyone before, my appointment is this week im so nervous.