How the heck do I stop convincing myself that bad things will happen? 
I have an upcoming trip with my mom coming up and all the bad scenarios are conjuring up in my head.

The luggage will get lost

The plane will crash (I have a horrible fear of flying)

My mom or I will die, have an aneurysm, stroke, etc during the trip

A loved one will die while we are away

And many more thoughts like that.

How does one control this kind of thinking? It has prevented me from doing many things in my life because I fear the worse case scenario will happen.

Like I said, any advice would be appreciated.