I am in the same situation and share your feelings and fear. For me is also frustrating to take a pill each day for the next 5 years, same as old people do. And I am 44 years old. I’ve started tamoxifen on the 20th of July, took first pill at 9 pm and couldn’t sleep all night because of the stress and fear. Next pill I’ve took it on the 22nd at 9 am during breakfast and so far so good, no side effects. I exercise daily and I guess it helps managing the side effects. Hope it won’t change in the following months. Good luck to all!