Need Advice on traveling for work

Hi everyone. I need advice about a situation I am in. I am 30 and my husband and I began ttc 6 months ago and we haven't had any luck. Also 6 months ago I got offered and committed to an amazing opportunity to go to the Dominican Republic for 10 days and to bring 15 students. (I am a teacher) My husband and I were so naive about ttc. I thought for sure I would get pregnant the first month or two in. Now I am approaching 1 year away from this Dominican trip and I am unsure of what I should do. Should we put ttc on hold or should we keep ttc and risk missing the trip? Also letting down my students. I am so torn about what to do.