Am I overthinking/reacting for canceling a trip in 4 weeks?

I am wondering if I am overthinking/canceling two back to back trips that would require me to fly 4 times in a week. My husband and I planned a 5 day trip to Mexico for his 30th before we found out I was pregnant. I also had a work trip placed on my me recently that would require me to fly again across country the day we are supposed to leave Mexico. So I wouldn’t be flying home with my husband but instead getting on another flight to go to my conference. We just found out about the pregnancy 4 days ago and I’m only currently 4 weeks pregnant. I want to cancel both trips because they would be around when I’m 8 weeks along and I know that’s when a lot of the nausea and other symptoms start to heighten. I already have an extreme fear of throwing up which makes me wonder if I am overreacting and would I be fine ? I just don’t want to let my husband or work down. In your experience would you cancel these trips?