Welcome to Connect @JakobMariok.
Sometimes finding a diagnosis can be a long journey. Have you been given anything to help relieve the constipation or tests to find the underlying cause?

You may wish to post a message to this thread by @amndahnry https://connect.mayoclinic.org/discussion/could-this-be-appendicitis-few-days-ago-i-woke-up-with-a/

I hope the doctors can help you find something. Have you had the pain while at an appointment or does it only happen with physical exercise?