So dr says im 2cm still but now 40% effaced mid station -3 im lost on the station part and does 40%…

So dr says im 2cm still but now 40% effaced mid station -3 im lost on the station part and does 40% effaced mean 60% more to go or 40% more to go? Some please explain if possible my dr wasnt in today and i just didnt really dig this dr so just dodnt really ask questions just wanted to leave also did anyone else beta test hurt like hell?