White patches

Hi all

I'm 24 week pregnant and had problems with bleeding so doctor examined my cervix after a further 3 doctors had been asked to have a look I was told that white spots/patches were visable on my cervix, I had cin 2 10 years ago which was removed my question is is it poaible to see changes in cervix with naked eye feeling very worried, told I should have an apo in 2 weeks for further checks