Auto-Toilets scare me!?

I am absolutely serious about this. I don't know why they scare me, but they just do. If I have to go to the bathroom and I tell my mom, and we walk into the bathroom and I see it is an auto-flush toilet then I make up that I don't need to go anymore. They terrify me! Am I alone? I have never had fear of regular toilets but I have always been scared of the auto ones. I am not afraid of automatic faucets or paper towel dispensers, just toilets,so don't tell me its a fear of automatic things! I am asking this because I am going on a road trip in 2 days and most rest stops these days have auto toilets! I need help really because I can't hold in my pee for 15+ hours a day for 12 days! When I walk into a public restroom and see the auto toilets my heart speeds up! And I know I'm not going to get sucked down them! Can someone please help me? I am a 14 year old girl. Thanks