Waalaikumsalam sayang, please jangan tunggu lagi, any bleeding during pregnancy, even if it looks small or brownish, needs to be checked by your doctor or go to the nearest hospital emergency straight away, especially since you are already 32 weeks. We truly cannot determine the cause from here, and your doctor is the only one who can properly examine you and baby to make sure everything is safe. Please take care of yourself, and do let us know how you are doing, we are all here praying for you and baby.