33 weeks and terrible back pain!

Lauren
I'm 33 weeks and spend a lot of my time at work sitting at a desk. By the time the afternoon hits my back is killing me and I noticed last night while sitting on my couch the pain happened as well. I know there's plenty of time for this belly and pain to keep on growing. I also have been contemplating a prenatal massage but looking for relief while at home and work too. Any one have any tips on how to get some relief?