I Have a Hormonal Imbalance

Can someone explain to me the. Cortaphanme test? That is likely spelled completly wrong. It's possible I don't even have the correct name of the test. It has something to do with laying down, and having a needle stuck in your abdomen. A Endroconologist orders it.
How bad does it hurt?
Do you normally have to stop certian things before having it done?
Afterward?
Thank you in advance for all kimdness, and answers.