Hi mama! Normal lang yung discharge na yan most of the time, especially after internal exam kasi sometimes may slight irritation, pero since you're at 37 weeks na at may brown discharge, mas okay kung i-mention mo to sa OB mo sa next checkup para sure lang, basta kung walang foul smell, hindi painful, at hindi heavy bleeding, you're likely fine. First-time moms deserve peace of mind, kaya don't hesitate to message your doc or call the clinic if may dagdag concerns before your appointment!