Hey Emma,
An awesome story to have shared.The part where you felt lighter by 20 pounds by shedding your physical possession was too good.
In trying to have more people understand what and why you got those feelings science and technology has so far failed us.
I stumbled upon this concept of existence and the purpose and see science of Human species.
Please take a look at this PPT and validate if this explains your being.
https://docs.google.com/presentation/d/1cf--RkAHZAoZf5uucXlhBhNKJSb2UuNyTFwYbS1R0y8/edit?usp=drivesdk
Look forward to hearing more from you.