The first thing you need to do is reduce the harm from sitting in front of the computer for prolonged periods of time, because sitting makes your body ache, and eventually leads to obesity in some people and early death (earlier by a whole 2 years). Is it possible for you to take your laptop, if what you have is a laptop, and put it on the floor or on a couch and lie down on your tummy to use it? Doing so will promptly relieve some of your pain.