Sounds like you need to work on your form.
If you get injured you need to let it recover. "a permanent sore back from and dead lifting and my shoulder hurts most of the time" is not good practice.
The risk of injury while on PB is no different to the risk of injury on any other diet. You need to know what you are doing and do it properly.
Lifting a significant amount of weight with bad form is a guaranteed way of injuring yourself.
The "Seven Deadly Sins"
• Grains (wheat/rice/oats etc) . . . . . • Dairy (milk/yogurt/butter/cheese etc) . . . . .• Nightshades (peppers/tomato/eggplant etc)
• Tubers (potato/arrowroot etc) . . . • Modernly palatable (cashews/olives etc) . . . • Refined foods (salt/sugars etc )
• Legumes (soy/beans/peas etc)