Ay, possible talaga yan na mucus plug, lalo na kung after ng evening primrose! A few of my mum friends nag-share din ng ganitong experience, parang thick, stringy discharge or may blood-tinged part, diba? Better to check with your OB lang para ma-confirm nang sure kasi bawat pregnancy different, at important din na malaman kung gaano ka-close na kayo sa labor. Keep an eye din kung may cramping or regular contractions na sumunod, pero mostly don't worry muna, normal lang yan sign na body mo nag-prepare na!