Trigger finger

I am taking letrozole for 1 yeari had joint and bone pain but was manageable. But a few days ago my thumb gets stack or snap to straighten. Something have to straighten my thumb with my other hand. It is trigger finger sign? It will go away by itself? I am scared because this affects my hand functions and it’s hurtful when it gets stuck. I am taking letrozole for a bit more than a year and I hope this is not a sign that my joins will malfunction one after another. Any advice how make it better. There is anyone who's trigger finger got better over a short time? I am still working and have a teenager. I must function. Thanks for any advice.