What does a closed cervix mean?

I went for a smear whilst in NZ and the doctor did an internal exam, she said, ohh you have a closed cervix, I asked her whether or not this would cause any problems and she didn’t seem unduly worried. However I did the foolish thing of looking it up on the internet and from the information I found it says this would only happen if I had, had surgery for warts (something I’ve not had) and that it is something I shouldn’t be concerned about especially if I am not preganant. Please help should I go back and see a doctor??