Worried

I went for a smear test last aug 17 and it came back significant changes which require further investigation, was referred to colposcopy clinic and had a biopsy this came back as CIN (abnormal not cancer) so I was then given an appointment for lletz treatment and received a letter saying this had been successful. 

I was then given an appointment for a smear test 6 months later and that came back again significant changes which require further investigation again so I now have another colposcopy appointment

Is this normal to have abnormal changes so quickly again. I'm a nervous wreck