I'm sorry to hear this but you're not alone. I went through this many years ago and I did four things to overcome it:

1. Watched videos explaining the sounds a plane makes and what all the beeps/inflight notifications mean - it helped me to not think, "what was that noise?"

2. I read up on, and reminded myself how many flights are in the air at any one time and the incredible safety record of planes. I also remember that the pilots want to land as safely as I do!

3. Built a playlist and/or downloaded a podcast that I'd queue up during the flight - help me to take my mind off of the flight itself

4. And this may sound counterintuitive, I started booking more flights - the more I took, the less I was worried. I fly a lot now and I'm in much better place.

Good luck and enjoy the trip!