Any advice for taking primrose oil or flaxseed oil during pregnancy?

Im 39+4 weeks pregnant, I have strong consistant contractions but Im not dilating at all. My dr says she doesnt want to risk an induction right now because Im not dilated and my cervix is still prettty thick. I asked what can i do to help soften the cervix and she just said walking and sex, which ive been doing for the past couple of weeks, Ive been reading online about primrose oil and flaxseed oil to help soften the cervix. I was wondering if anyone has tried any of these and is it effective?