Aaah, ang dami nang expecting moms na nakaexperience ng ganyan, kaya don't worry ka muna! Yung mucus plug can come out in stages or all at once, so kung lumabas na siya ng dalawang beses, sign na talagang approaching ka na ng labor, pero hindi agad, kaya okay lang na umuwi muna kayong dalawa. Since your OB already checked you at 2cm pa lang, wag ka nang bumalik unless may heavy bleeding (like period or mas dami pa), or tumaas na ang fluid, or labor contractions na regular at masakit talaga, yun na ang real sign na oras na. Two days na walang signs is normal pa rin, honestly; some moms go days pa after ang mucus plug bago sila mag-labor. I'd say stay calm, watch for those warning signs, and if anything feels off talaga or laging ka anxious, one quick call to your OB won't hurt, pero based sa check-up mo, you're doing fine!