Primrose

Starting using primrose last night (officially 36 weeks and ok to do so) and now I'm having a lot of mucus and some light (as in I only see in when I wipe in stringy bits with the mucus) bleeding. My cervix feels the same so I'm wondering why this is happening? I know when the cervix changes or you lose your mucus plug there can be bleeding but I swore I already lost mine a week ago. Baby is moving fine. Do you think labor is starting?