Anak, I really think you need to check with your OB right away about this, especially since your cervix is already open at 2cm. This is something that needs a doctor's guidance talaga, hindi pwedeng i-DIY based on what you read online. A few of my mum friends had questions about evening primrose too during labor, pero honestly, lahat sila nag-ask sa doctor first bago gumawa ng any move. Your OB will know what's safe for you and baby based on your specific situation, kaya please don't delay, message or call them now, okay? You're doing great, mama!