I was diagnosed with Stage 1a-b breast cancer in 2020. I had a lumpectomy, a second surgery to clear the margins, 16 rounds of radiation and then started to take anastrozole which was the most difficult part of my treatment. The side effects, which were from head to toe, resulted in a very poor quality of life. I can definitely relate to your anxiety. I was severely depressed. My oncologist, at the time, did not acknowledge any of my symptoms as being caused by anastrozole. Sadly, this seems to be a common complaint on this forum. At the only appointment my husband was able to attend because of covid, he told the doctor that the medicine had changed my whole personality. I was aware that I had not been myself, but his comment summed it up for me. He was always more than patient with me but was trying to impress upon the doctor that the medicine was indeed having an extremely negative effect on me. I decided to stop taking the medicine after about 2 1/2 months. The side effects subsided. I also started walking which I have continued to do every day for over 3 years.
I know that I am fortunate that my Stage 1 cancer was discovered early, and my chances of recurrence are lower than many others. I would never suggest that anyone not try to take an aromatase inhibitor. These medicines affectCs everyone differently and you can always stop. We each have to make decisions based on many factors - stage of cancer, age, other health issues, family situation, etc. However, it is our decision to make. There will always be a part of me that wonders if I made the right decision.
I hope this input is helpful. I wish you all best of luck in your treatment and good health in the years to come.