Pregnancy symptom??

I have never had car sickness or any motion sickness, within the last 2 weeks every time I get into a vehicle I feel sick, my husband and I have been trying for a baby for 10 months and still nothing, I have pcos so I never know when my periods are supposed to come. Just wondering if anyone has had this as an early sign of pregnancy, too a test 3 days ago and was negative. Thanks!