@imkate- I can imagine that it's pretty frustrating not knowing what you "have". This is one of the things I don't understand is when doctors who don't make sure that you're familiar with what is going on. Have you asked your Oncologist to identify your cancer? When you go to the doctors it's very important to have list of questions with you and to have someone with you. You might not know what some of the questions to ask but you certainly have some, and the doctor needs to answer everyone of them.
Here is a guide to work your way round Connect. https://connect.mayoclinic.org/get-started-on-connect/

Here is my blog. It highlights my journey. https://my20yearscancer.com/
When is your next appointment with your oncologist? How is your breathing? I wish that I could reassure you that this cancer isn't as "bad" as other cancers. all cancers are bad. However if you do have multifocal adeno. it is very slow growing cancer.
Please feel free to ask me any questions or any of the other people that I have mentioned. I hope that you get back to me.
https://ascopubs.org/doi/abs/10.1200/JCO.2017.35.15_suppl.e20041