Ttc testing ovulation

Jennyfer
I have a question, we've been ttc #2 for about 6 months but my husband's military so it's been hard to have sex on my fertile days. I am taking ovulation tests this time around to get a batter idea of when I ovulate so my question is if I don't get pregnant this time do I need to test every cycle, or is just this cycle enough to learn when I'm ovulating? Tia!