Ay, that's such a common worry sa late pregnancy, mama! Honestly, ang mucus plug kasi usually thicker and sometimes may tinges ng blood, kaya kung yung discharge mo ay parang normal lang pero maybe a bit more, it could just be the extra discharge na talagang normal tayo magkaroon towards the end, one of my mum friends said dito na rin siya nag-panic at normal discharge lang pala hehe. But since you're so close na to your due date and nasa 37 weeks ka na, mas okay na i-check mo with your OB/GYN para sigurado, lalo na since they know your cervix status na; they can tell you right away kung yun na or hindi pa. Good luck, mama!