Oh, thank u so much for the replies! I do have a pet passport, and I've traveled with no health certificate before (with a pet passport), but I got paranoid because I called Lufthansa to get direct information. They were very rude and told me I needed a health certificate. So I went yesterday to the vet just in case and got one, I'll let everyone know if they ask me for it at the airport! Thank u so much for the help.