Anxiety for advanced illness

Since 2 weeks ago since my Dr.and I discussed my pet scan results which said that my PC has been spread out to the bones I have been living in anxiety and depress even though my doctor told me that is not terminal that still are some other treatments ,but my mod still some times put me down because I tried quimo,immunotherapy and nubeqa and now my oncologist referred me to an oncologist radiologist in order to start a IV radiation treatment but still my mod sometimes is down. So if you know any technique in order to stop overthink and overthink about it and with that radiation treatment what would it be my limitations.I don't want to Google it cause there is a lot a bad statics about the topic.
Thank you