Newly diagnosed and can’t get a handle on my anxiety

Hello All. I am very happy to have found this group. I am awaiting my cultures but I have been advised to expect an NTM diagnosis. My nodules and other pulmonary changes were found incidentally with a Calcium scoring test.
I am 68 y.o. “healthy” female and my entire adult life has centered around an active and healthy lifestyle. I run, swim, bike ride with my husband and it’s what our life is all about. Since my diagnosis, I am in an extreme state of anxiety and panic and cannot “settle myself down”. I am not sleeping well and I have a horrible knot in my stomach.
I am filled with grief and sadness. I am overwhelmed by the amount of information and now feel completely constrained from living a normal life. I’ve ordered .2 micron filters for the tap and my shower as well as the Life Straw and Steri Pen. I am terrified now to do anything- go out to eat, shower, ride my bike if windy and chance of dust blowing.
I guess my question is related to feeling this way and I wonder how long this stage lasts until I can find a balance and some type of normalcy. At this point, I do not see how I am going to deal with this diagnosis and enjoy my life. Please share how you were able to deal with these feelings and any tips to get out of this horrible state of mind. Thank you all so much, Lynda Saathoff