What is the easiest way to get rid of pain? Would pregnancy affect what drugs i take?

My name is Bethany Pritchard i am 21 years old. i have been living with arthritis for 16 years i was diagnosed when i was 5 years old. I have been on many biological drugs and had many pain killers from paracetamol to morphine yet nothing helps with the pain..i work as a care assistant at a care home which i am on my feet constantly i am always in pain yet sitting down all day i stiffen up. I have tried everything yet nothing helps?? And pregnancy i would eventually like to to start a family..but i am scared that my child might get so i am worried as i don't want my child to get it and be in the pain i am in yet no one in my family had it when i was diagnosed. Is there any guarantee that i would not pass it on to my children.. :) many thanks beth