Low back pain from fall ?

i had a fall at work and fell on my tailbone and been off work for 3 months . been to pysio ect had acupuncture ,tens unit mage nothing has worked have tingling down my legs , numbness in my toes pain in my hips and across my lower back and the pain goes up my back to . dr has given me antinflamitorys they haven't worked nothing seems to work now he wants to do a bone density test all i had so far is a xray nothing broken thank god . but the pain just wont go away and its very annoying and very limited to what i can do i think i need a mri to see if there is any damage but dr thinks there will be nothing there i think my self its nerve damage from the fall compo says they find nothing wrong and can go back to normal duties i cant even do my own house work with out in pain , i work as a custodian so lots of cleaning , any suggestions on what to do would help ty