Maybe its a pinched nerve ?I'm not a doctor or anything but if your arm hurts to the point you can't move it your first instinct should have been going to the emergency room severe pain that gets worst in a short period of time could possibly be a serious condition and should receive attention immediately you need to take better care of yourself. Aslo taking pain medication for along period of time is not a good idea your body can develope a tolerance and therefore you have to keep increasing your doses you should only take them when you need them and should only use an appropriate dosage, taking three pain pills at a time cannot be good for your nervous system but then again I'm not a doctor so your best bet see a doctor if you haven't already and really even though I'm giving you and answer you rely shouldn't post that you want medical advice there's no telling what kinda bad advice you would receive only a doctor should give medical advice.
Sounds like a trapped nerve chiropractors can manipulate your neck to alleviate the pain you may need anti inflammatories to take down any swelling
It could be your discs. They or one could be rubbing on a nerve and causing your arm to hurt! I have been having the same problem for the past week and have been reading up on this.Go see your Dr. Get him to order special x-rays for this (maybe I's a herniated disc) too many possibilities. Hope the best.
I don't even pretend to know the answer but it sounds like you should have already been to a doctor instead of just taking pain meds that you should not just have lying around unless you already we're prescribed them and your just pulling our legs on this question...and if the pain meds we're prescribed for something else and your using them for this pain why we're you prescribed meds your not using for what they we're prescribed for in the first place...I think doctors warn against self medicating because it could conceal hide other problems since you don't sound like your a doctor and I know I'm not...you need to see a doctor instead of waiting around and asking us questions you should be talking to a doctor about...later hope this helped....
My arm has been hurting for about 3 month also my neck and shoulders feel a lot of pressure on them when I walk. I do have spinal stenosis also disks but my arm feels like someone is pressing the veins between the front part of my arm.
Sorry I have to say one more thing. Instead of insulting the negative feedback, give a little more info after their comments. That way they can help out a little more.