What can i do to thin my cervix and start dialating

I'm a ftm and my doctor told me that my cervix is still super thick and I'm still very closed have not dialated at all I'm 38 weeks and 2 days my due date is on April 16 what can really truley help me?? He even told me that I might have her till I'm 40 weeks and 5 days I'm so anxious to have her what can I do??