Ay, first time mom kaya nakaka-anxiety talaga lahat ng bagay hehe! The mucus plug can look like that, parang thick, stretchy discharge, sometimes may slight color, pero honestly, you really need to check with your OB agad to be sure, especially since you're 38 weeks na, kaya they can assess if it's the plug or something else and if baby's ready or if there's anything else going on. Better safe than sorry sa ganitong stage ng pregnancy, sis!