Help wanted

I’m 30 years old and have never been on a plane and have avoided it soo many times to the point I wouldn’t apply to jobs that had any traveling involved. I know it’s ridiculous… My job seems to be having a possible conference in a few months and just the thought of flying makes me sick and shake. The second I heard that my heart dropped and I am in full blown panic mode, thankfully my fiancée is very supportive and wants to help me through it but can anyone provide any help or advice? I know planes are the safest form of transportation but I think it’s the fear of the unknown and the fear of having a panic attack that’s sending me into a spiral. Any help is greatly appreciated!