Anyone ever tear a triceps muscle?

I fell very awkwardly about two weeks ago and my left arm kinda got twisted behind my back. I was worried I may have broken it at first, but it was ok. It was a little bit sore. But it has progressively gotten worse, making it really hard to sleep etc. I tore or severely strained my bicep once at the gym and it hurt like this but got better.

Urgent Care did a bunch of x-Rays and nothing is broken. The entire back of my arm to my shoulder is killing me and the bottom of my bicep.

Been icing, tens unit, Voltaren, muscle relaxers, etc etc but each day it gets worse. Has anyone ever dealt with anything like this?

I know I will have to get an MRI to see how bad it is but just trying to manage the pain right now. Any advice appreciated