Hi Yvonne, what I know about septic shock would fill a thimble...but the fear of "having it happen again" is familiar to me. I have had both scary heart symptoms that landed me in the hospital and a severe lung infection that has a 50-50 chance of coming back again. For a while after each event, every pitter-patter of my heart, or every coughing spell led me to "Oh, NO, not again!" The feelings eventually settled down, and here I am, still going 19 years after the heart scare & 5 years after the infection.

What helped me was some anti-anxiety exercises suggested to me by my primary. This was on paper (before widely available self-help on the Internet). Here are a couple of Mayo posts that might be helpful to you:
https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/tips-to-help-ease-anxiety
https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/11-tips-for-coping-with-an-anxiety-disorder
I find the breathing exercises and the meditation exercises work for me (follow the links - the blue highlighted words.)
Maybe these will help while you wait for the other appointments.
In the meantime, I see you are making progress - you didn't mention your pulse oximeter even once in this message - hang in there!
Sue
Sue