Impact of traveling after acl surgery.

Does a new ACL graft get loose or torn or shift from its position if the patient travelled by car two days after ACL surgery? History :After getting discharged from hospital and by taking doctor permission,  I went to my home town by car, sitting as straight leg, the journey is of 8hrs, I got doctor approval, so at that time i think there won't be any problem, but during journey, due to potholes & speed breakers. I got some impact on my knee, knee moves up & down many times and when I reached home there is lot of pain on operated leg. Next day I feel like my knee movement is more flexible compare to day before traveling. So is there any impact of traveling on the newly reconstruted acl graft? Is that new graft get loose or shift from its position? Or is there any impact on the fixed screw or pin due to traveling? Please suggest me what to do in this situation!