Rheumatoid Arthritis Treatment

Been having really bad pain due to my Rheumatoid Arthritis in my knees and ankles and the doctor won’t do anything except tell me to take some Tylenol.
I went to a different doctor and he prescribed me Darvocet, which again does nothing more than Tylenol/Aspirin/Advil. He even raised the dosage and i can’t feel a difference or pain relief.
I’m 17 and understand that teens abuse drugs, but i can’t even have a serious conversation with these college-educated doctors without them assuming something that i’m not aiming for. (Abusing it)
I’m pin-pointing Vicodin only because my mom will occasionally give me one or two for the day. It helps my pain a lot. I wouldn’t say it cures it and makes it absent, but, it sure has a relief effect that i can’t seem to achieve taking anything else. She has 7.5mg hydrocone and 10mg hydrocone vicodin’s, which are 750mg and 1000mg prospectively.
How would i get my doctor to prescribe me something similar to my mother’s prescription? She has hers for Rheumatoid Arthritis too, but since i’m 17, i can’t be taken seriously i guess. I can’t tell my doctor, “Oh yeah, my mom gives me 1 or 2 and i pop em and a lot of my pain is gone for quite a while.”
Any help is greatly appreciated.

I take 1 20mg pill 3 to 4 times daily. But I can see that I eventually will need to take more because your body gets used to it and it does not work as well. I would just like to know if I’m going to live long by continuing to be pain-free by using this drug. I am prescribed this for Rheumatoid Arthritis and the pain sucks! The medicine really helps, but I’m afraid of dying young.

Someone I know says she’s on morphine for rheumatoid arthritis. I think she’s lying and just has a drug problem. She does physical labour, which doesn’t make sense if the pain was that bad. She does miss a lot of work days. She says she’s trying to quit the morphine but hasn’t seen a doctor about this. I would like to hear opinions especially from doctors and nurses. Thanks.