Good morning Nick,
Some people (not all, I didn’t) have bone pain prior to harvest due to the drugs used to encourage the stem cells out of the bone marrow into the bloodstream, but you shouldn’t have pain or discomfort afterwards. Actually you are likely to feel really well, apart from the anxiety of the approaching SCT. You will be free of all the side effects of the induction treatment, your myeloma level will be minimal, and you are likely to feel better than you have in months.