Hi @Summer Prevails, some people do fear oestrogen. I had oestrogen positive cancer, high return rate, grade 3. It has been nearly 3 years so I am still taking Letrozole. I am post menopause so no periods expected. However I do sometimes wonder how I will feel when I stop taking these pills. The fact is that these pills including tamoxifen that pre menopause women take do not provide 100% protection against cancer returning. There is no 100% guarantee in life about anything. Maybe talk to your dr, psychologist or psychiatrist about your fear. You probably need other strategies to help with dealing with this. One thing for sure is that you are correct when you say breast cancer survival is complex. It most definitely is complex.
