Traveling with one test

Jan • 27 yo, married for 5 years. TTC #1 beginning 01/16! Mostly paleo in diet but hardly ever pass up a donut.
Today is my first day of my missed period. My BBT is still elevated so I want to take a test, but I'm away from home for another 5 days and only have one test with me. Should I take it today or wait?