Hip replacement While in Treatment for Breast Cancer?

I'm looking for people who have had to get orthopedic surgery, especially hip replacement, during or around their treatment for breast cancer. I am on a type of hormone blocker, Fulvestrant, and am wondering if I need to take a break from that for a successful surgery & recovery of the hip. The side effects I have now with Fulvestrant are elevated blood pressure, muscle & bone pain in the last month, and now a rash on my legs that I'll be seen for tomorrow. It is successfully shrinking my chest wall tumor. I don't have bone mets so that should be a good thing. I just am in such pain from this hip osteoarthritis, PT has not helped it, and would like to be able to go for walks again!
Thank you for any experiences you might share. ~ Patty