Am I overreacting?!?!

Hey guys! So I recently got my BFP. However, my fiancé and I pre-planned a trip to Turks and Caicos for his 30th birthday in December. Once I found out about our new munchkin, I suggested we cancel the trip and go someplace else due to the Zika virus cases that had been reported there. Now his friends have already paid for their trip as well and it’s pretty set in stone. Now the CDC website states that pregnant women shouldn’t travel to Zika reported areas and if you have a pregnant partner to either disengage in sex until the baby is born OR use condoms until then. My fiancé insists on still going and I’m super aggravated over it. Am I overreacting?