I Have Factor 5 Leiden. I Am 6 Days Late

I have factor 5 leiden. I am 6 days late for my period. I have been nauseated (mostly with smells - i.e melon). I have also noticed tender/sensitive breasts and have experiencing a lot of small burps (very atypical for me). I had my IUD removed in early September as my husband and I are ready for children.
I took a HPT and received a negative result. Im curious is I should contact my OB for a blood test - mainly because I will be driving 13 hours later this week and returning early next week. I know that pregnancy and travel both increase risk of clotting.