How to deal with pain until appt

Hello! My name is Ayn and I’m from the US. I am discovering that the symptoms of pain i have aren’t normal back pain and it’s getting more and more excruciating as time goes on. I’ve had this “burning, icy hot, numbness” in my arm and back before and my grandmother had MS too.
So what I’m wondering is how to do pain management until i see my GP? I can’t put pressure on my left arm without a stabbing pain in my back and I’m so tired of not being able to do anything.
Thank you in advance!

Hi. I hope you’ve now managed to see the GP and got your pain under better control.