Hi, I understand your concern. After ovulation, ovum unites with sperm to form fertilized ovum.The fertilized ovum gets attached to uterine wall & starts getting oxygen from maternal circulation,to be used for fetal development. This takes place by 6-12 days of fertilization. The connection between fetus & uterus is made of delicate tissue to start with-gradually it further develops to form placenta 12-weeks of pregnancy. * Obviously any untoward stress/jerk,/ blow/ hasty movements from 6-12 days of fertilization may turn harmful for pregnancy.However, a journey without the risky factors / done with full comfort ,may remain uneventful. - Some times the day of journey may not co inside implantation, and risk may be escaped even in case of stressful traveling * still it is always better to avoid stressful travels in 6-15 post ovulation days to avoid unpleasant event. * The white discharge you had noticed can be a normal reaction of uterus to pregnancy--- provided it is not excess/ no cramps/ any red,pink discharge. * In short effect of travel on pregnancy in early days need not be always dreadful -if taken care of /managed properly. Thanks.