Can LEQVIO side effects mimic an RA flare?

Last September I started having joint pain and more fatigue than usual. I have over 30 years dealing with RA so I thought I was having a flare. By Thanksgiving I was having trouble getting out of a chair, I couldn't use my hands, and my joints ached all over. I love Christmas and have never missed putting up a tree but I couldn't do anything, and quite frankly I felt so bad that I didn't care if anything got done or not. My husband did the cooking, cleaning, and even put up a tree. Wish I could have shown more joy.

Things continued to get worse with burning sensations on top of my feet and the tops of my hands. I had aching and burning in my upper arms, up the sides of my hands, and in my shoulders. I wear hand braces sometimes because my hands hurt so badly that I feel like I need to protect them. I had to buy a seat for the shower because I couldn't stand long enough to take a shower. I have to wear clothes that can be pulled on, like elastic band pants and pull-on tops. No bras and nothing that has to be buttoned, snapped, or hooked. I can't write and I have a really hard time typing or holding things, like a book or a plate. I don't know if it is related but I sometimes get small blistery sores on various areas of my body. They go away in a few days and they don't itch.

It wasn't until April that I remembered that last September my cardiologist put me on LEQVIO and that I might possibly be having a reaction. It had never entered my mind because even though the statins my doc had tried caused tremendous muscle pain in my thighs, I normally tolerate drugs pretty well and my doc said all of his patients have tolerated LEQVIO very well. However, a brief online search led me to patients who had symptoms very similar to mine. In addition, my husband mentioned what I was going through to his therapist and she said the same thing happened to her. And a nurse I see said her mother had a similar experience as well.

Sometimes the symptoms ease up a bit - like today I took a shower and stood for a bit in the shower and I can use my hands to type this note. But so far, over the past 8 months I have gotten my hopes up for nothing as the symptoms always come back within a few days. This is not RA behavior. I am due my second injection of LEQVIO this month but if this truly is an adverse reaction there is no way I would put myself through this again. It has been 8 months of hell.

I guess I am here to try and find out what is wrong with me. My doctors are stumped. Things I am pondering:
1. Have others taking LEQVIO had similar symptoms?
2. Could my RA be exhibiting in an unusual way? (my tests are good)
3. Or could I possibly have some other undiagnosed condition?

Hoping to find answers or avenues to explore.