I had a severe autoimmune response to this drug. It started out with the quote normal flu like symptoms and then 48 hrs after I fainted and ended up having to call myself an ambulance. Thank God I woke up and was able to do so
My. Potassium Levi’s dropped so low ( hence the losing consciousness) I had to be treated twice. Severe esophagitis, acute Colitis
Couldn’t eat so I lost 10 pounds in two weeks. I only weighed 109 to begin with
I was unable to work for 6 weeks. My heart rate is all over the place still and I have been lightheaded for almost 7 months. What a nightmare.
And I know it was the Reclast because I was perfectly fine up until that shot.
Luckily no muscle pain.
I’m sorry you are suffering
I’m so angry for all of us

I'm definitely not a doctor, but have had a frozen shoulder (completely unrelated to osteoporosis). It's very painful and seriously impacts range of motion. Could that be the cause of your pain/immobility in your left arm? In fact, I had frozen shoulders in both shoulders, though at different times.

After unsuccessful physical therapy (PT) on my right shoulder, I had a "surgical release". That is a bit of a misnomer. There is no cutting involved. The orthopedic surgeon manipulated my shoulder under anestheia to release (rip) the adhesions. I woke up with a pain pump that remained for some period of time (3 days? It was a long time ago, so I don't remember exactly.) I then returned for additional PT.

Sometime later my left shoulder froze. Between the two events I had read a research article that said there was no significant difference in outcome between patients who chose a surgical release and those who simply waited for the shoulder to unfreeze. (Sorry, again, it was a long time ago, so I don't have the reference.) I am right handed, so waiting for the left shoulder to simply unfreeze was painful, but didn't interfere as much with my daily activities.