Hello I'm a 25 year old American male and I was diagnosed with Hodgkin's lymphoma approximately 2 years ago and in order for me and cancer specialist to figure out which stage I was in at the current time I needed a bone marrow biopsy,so shortly after I proceeded to get the procedure doneAt a cancer treatment facility.So I scheduled an appointment to have the procedure Done and of course I was terrified I didn't feel too good about having a needle stuck in my spine.During this procedure I had to be stuck with this needle at least three times and the doctor made a remark stating that I had strong bone..This procedure took place at least a year and a half ago maybe 2 years ago and I still have excruciating back pain from this procedure is that normal???....Please reply..