Hay nako, I totally get the worry lalo na malapit na due mo! One of my mum friends also took evening primrose oil orally at ganyan din ang side effects niya, the nausea and diarrhea are real talaga, but they usually settle down after a few days so don't panic na akala mo labor na agad haha. Pero honestly, with those symptoms at 37 weeks, I'd really suggest you check in with your OB first para ma-confirm if it's just the oil or something else, especially since wala si partner, mas mabuti safe na lang kaysa mag-worry lang rin kami all day! Kung confirmed naman na side effects lang talaga, then you can decide with your doctor kung continue mo pa or switch to another method; some of us din just did walks and other natural ways to help soften the cervix na walang side effects na ganyan. Take care ng sarili mo, sis!