How to protect toddler, newborn, and fetus from measles while traveling?

I booked a trip flying from the EU to Dallas, TX then to Ohio and back to the EU months ago. I will be appx 20weeks pregnant and my 2.5 year old will be traveling with me. I will be staying with (in both states) people with newborn babies.

We are all aware of the measles outbreak in Texas, I just want to do my best to protect the newborns who aren’t able to be vaccinated yet. I also wanted to know if I should be doing anything, as a pregnant lady, to protect me and fetus.

I tried to get an appointment at my daughter’s pediatrician but they have no appointments until after we are supposed to leave (in April).

Edit : My toddler and I are vaccinated.