evening primrose

Hello mommies. I am 37weeks and pinapag take ako ng evening primrose 3x a day for 5days. Pampanipis daw po. Gaano po ito kaeffective? After 5days po ba manganganak na ako? First time mom. Very excited and nervous. Estimated due date is on Nov 1 by Last menstrual period. Please comment down. Thamk you!