Hallow, Brown discharge during pregnancy is not a good sign. Brown discharge means old blood getting expelled out. This can happen when the bleeding has taken place inside the uterus. Usually, this is when the baby and/or the placenta are getting separated from the uterus or when the baby is not viable for some time and still has not been expelled out (missed abortion). Since this has happened after a hectic travel, the risk to the pregnancy cannot be ruled out. Please do not take the things lightly. Report to the Obstetrician ASAP. Urine pregnancy test may not be conclusive since it takes about a week or more for the pregnancy test to become negative after the baby has become non viable. Ultrasonography will be very useful in arriving to the diagnosis. If the baby is not viable, you may have to undergo termination of pregnancy without delay to avoid complications like bleeding and infection. If the pregnancy is viable, you may have to take bed rest and may be the pregnancy will have to be supported by some Progesterone preparation. I wish you the best luck. Please take due precaution.