38 weeks pregnant, contractions 10 min apart, lost plug...?

It varies from person to person. Seeing as the plug has let loose, its hard to tell if your water has broken at all. (Not all women get the gush at first, my water had a "tear" and only "trickled" for about 8 hours before it "broke".) I would suggest skipping the bath to help induce contractions to higher speeds, until you see your dr, or they check you out. Warm showers can help bring on contractions faster, as can walking around. This is a good chance to help with breathing techniques, and finding comfortable positions to be in to help cope with harder labour. Best of luck to you...I don't think it will take too long.