Evening Primrose Oil

Johanna
Hello Ladies! 
I'm 37 weeks pregnant with my 3rd child. Currently, I'm 1cm dilated, 50% effaced as of 08/23. I've been having Braxton Hicks on and off, cramping, rectal and cervical pressure and increased vaginal discharge... I've noticed rectal discomfort for a few days now. I think I got hemorroids and among all the discomfort I'm going through, I would like to try to speed up the labor process. I'd like to get your opinion/experiences on Evening Primrose Oil. Is it safe?  Dosage and brand recommended ? How often? Orally or vaginally? 
Thank you