Ay, that could be your mucus plug talaga, especially since you're already 38 weeks, a lot of us moms experienced that brownish discharge before labor din, kaya baka soon na! But honestly, the safest thing is to call your OB or go to your clinic para sure, lalo na kung may red na sya ngayon, kasi they need to check kung everything's okay with you and baby. Keep an eye din if may cramping, bleeding heavy, or contractions, para alam mo kung kailangan mo agad pumunta sa hospital. Hopefully labor's coming soon na para makita mo na si baby!