chronic shoulder tension or RSI

I have a veru debilitating situation at the minute and I dont know what to do.

Firstly , there is NO pain.....just a lot of discomfort , which is as bad as a pain.

I worked in telesales for a year.
Its illegal to call from telephone books but thats what this company did.
Because my eyesight is poor , and cant be corrected , I was reading the telephone numbers via a magnifying glass and I was hunched over a desk for 5 hours a day , in this position......

If you sit bolt upright , and imagine that your torso is at 12 noon on a clock , and the legs are at 3pm. Well , my torso was at the 2pm position for about 4 out of 5 days per week , 5 days a week , for a year. I had to lean forward like that to be able to see the numbers.

I started getting annoying shoulder tension and went to the doctor. He prescribed me diazepam 2mg , which used to work , but now dont.

I made a few changes at home as well. I got a memory foam mattress , and instead of spending long hours on the floor typing on a laptop , I got a tablet pc.

Im no longer in the job , and I thought the shoulder tension /fatigue / rsi would be a distant memory , but its got worse.

I also have a hiatus hernia just beneath my solar plexus and it has flared up in the past few weeks. It affects my breathing which feels irregular , as if im overbreathing and taking too much oxygen in , then I feel bloated , then my shoulders go up to my ears and I get very tense and rigid , and have even had a few panic / anxiety attacks.

From the moment I awake now , I spend hours pacing up and down with a vaccuum cleaner tube behind my head , with my arms over it , in an effort to pull my rounded shoulder blades back , which does work for a short time.

I also invested in a foam roller , and have been attending a physiotherapist , but she isnt doing anything.

I spend a lot of time holding my breath in an effort to control my breathing and to push my shoulders down.

Please help. I am in a lot of discomfort and dont know what to do to fix it.