Mucus Plug Discharge

Hi mummies! I just went for my 38th week routine check up and doc said baby was not yet engaged. I'm scheduled for another growth scan next week! After checkup , me and hubs went looking for food when i had to go pee 💁‍♀️ so after my business , i realised a blob of red discharge. Is that my mucus plug coming off? Should i be concerned? What should i do? Will labour come anytime soon? I'm not yet prepared 😣😣