ok so ever since my Dr checked me Thursday and said I was 1cm I've been having brown discharge like…

Definitely should call your doctor. Regular discharge is usually a white/clear color.

I googled what it is, this might help. http://www.women-info.com/en/brown-discharge-third-trimester-pregnancy/

Sounds like your bloody show

Every time I am checked I have a discharged like that, my dr said its some blood or old blood from her checking me and not to worry

I agree with @manders89 Mine did same thing for two days.