Uy, I totally get the worry kasi first baby mo pa, pero honestly ang evening primrose oil is hit or miss talaga, a few of us tried it at some swear by it, pero iba-iba lang talaga ang body ng bawat mama, kaya best thing is to ask your OB about it para ma-check nila kung safe ba for your situation. At 38 weeks pa lang yan, magsesesh pa ang cervix mo naturally kahit walang supplements, maraming moms dito na suddenly nag-open na lang within days ng due date, so don't stress too much pa! Keep your OB updated lang sa gusto mong subukan, and mas importante na mag-focus ka sa pag-rest at pag-hydrate para ready ang body mo, sis. You'll get there!