Hi Kazzi
I take Tamoxifen in the evenings; when I had my first script filled the Pharmacist had suggested it may make me feel nauseated so I opted for the evenings to sleep any of that off! It is about what suits you and your routine.
Not sure about normal; we all have to find our new normal as this journey has twists and turns. Ask lots of questions about Tamoxifen and ask if they need to do any markers so they can monitor any changes. The Oncologists keep telling me the benefits outweigh the negatives, which I am sure is right but knowledge and awareness for us ensures a safer journey.
Good luck with your journey and your transition back into worklife.
Seasons greetings
Take care
Christine xx