Very worried! But am I over reacting!? 

I'm 27, ive been with bf for 5 years and been on contraceptive pill for 5 years. I've always had very easy periods. 3 wks on pill... 1 weeks off and only on period for 24hrs and very light. 

Then in January I all of a sudden had a big dark bleed, during my pill pack. I left it for 24hrs and then called  the doctors... He said chances were it was a miscarriage. Anyway I bleed for 7days. In that time I called docs and arranged a smear test.   admittedly very late for my age :-( I had smear test 2 wks ago. The nurse was lovely. When she was doing it, she said she needed to get a doctor. The doctor said I had a very pink cervix.... What does this mean?

Anyway... I've been worrying since, as knew it was not normal for a doctor to be called in.... Then yesterday (Saturday) I received a letter saying I have high grade dyskaryosis:-( 

What is this? 

I need  a colposcopy which I have read about online, so I think I know what to expect... I haven't got the date for this yet... How long will that take? 

Also I've been bleeding after sex... Which I also mentioned to the doctor, but I put that down to the miscarriage 

I'm really worried... What are usually the outcomes from a high grade dyskaryosis? 

Sorry I've realised I've gone on abit now. I've made out to the bf, that I'm not worried. But after 24hrs, I really m. .... Thankyou to anyone for your comments :-)