36 weeks and 4 days and blood! Help!

So I was checked yesterday and 50 percent effaced and 1/2 cm dilated. This afternoon I noticed a glob of dark red blood. I c allied my doctors and she said it was probably from the cervical check but it was too much to be from that. I've also checked myself before and I've never bled. Anyone experience this before? Is it bloody show?? Please help