Worried again :( symptoms!

Hi all, 

It's been a while since I posted on here.. 

I'm panicking :(

2 years ago my smear came back with cin 3. Had LLETZ, CGIN was found so I had a cone biopsy. 

The results of that were all clear, as were my two 6 monthly smears so I got put on 3 yearly recalls. 

For the past week I've been spotting. This is very unusual for me as my periods usually start on time and they start heavy! Sorry TMI! 

Can cin 3 or any other changes happen within a year? I'm terrified something might have been missed on the smear test and now it's developed :(

Please could you lovely lot share some stories? Not looking for reassurance, Im just stick with what to do next. 

Thank you, you are all superstars xxx