What Tests Should Be Done If Suffering From Back Pain?

Hi, I am a breast cancer survivor (stage IIb ER/PR + Her2 -). Lately I have been having lower back pains, to the point that I couldn't stand up for more than 5-10 minutes without having to take pain killers. I had an MRI of the lumbar spine that didn't show any sign of metastatic disease. But since I started having hip pain as well, to the point that I needed a cane to be able to walk. I also had had chemotherapy (Taxotere + Cytoxan) and I have a cyst on the right ovary that is supposed to be removed (I will have oophorectomy). I am seeing my oncologist in 2 weeks, what tests do you think I should ask for? I am terrified of a bone metastasis.