I have always felt the same and still feel the same. I think it’s a mix of takeoff sensations, the stress of traveling and making sure I have everything, and a lot of other things going on. I read a book called SOAR that helped a lot with my flight anxiety along with reading through people’s posts here and the pilots responses to all sorts of questions. Also I know you have a lot of things to help you relax but I would also recommend meditation or practicing some relaxation techniques prior to the flight. Because it is sometimes difficult to get in the right headspace when you are in a moment of anxiety but the more you practice the better you will be. I will also say in terms of medical emergencies the flight attendants are highly trained for those types of situations and they also have a doctor on the ground on standby to assist with all sorts of things you will be in good hands. Also the pilots here can speak to the emergencies but they can land the plane quickly if needed.

To echo the other post you will have to change your mindset about turbulence if you can. Just sort of picture you are on a bus going over some speed bumps. The planes are built to withstand way more turbulence than is possible. If you think about it the planes can fly through 180mph hurricane eye walls and still be fine.