Mucus plug?

Kanina morning around 7am I woke up not knowing na basa ang panty at shorts ko. My mom asked me if nakaihi ba daw ako, hindi naman. So naligo agad ako. Then after breakfast, naramdaman kong may basa ulit so I checked it. And eto po yun. I immediately called my OB and was advised na pumuta hospital asap. Pagpunta ko, e-ni IE ako but closed cervix pa daw. Hindi po ba to delikado? First time mom po. By the way 38 weeks and 5 days po.