Long distance travel..is it safe?

Hello.. I checked upt this morning and it's positive. I'm using the clear blue upt and it says 2-3 weeks. But if calculate using the last period date, it is 4 weeks 5 days (don't know which is true ?) So my concern is, is it safe to travel long distance during this early pregnancy? My husband and I will have a long road trip (about 2 days) the day after tomorrow. #firsttimemom