I had a reverse shoulder replacement in October and had a nerve block for 3 days. The first 12 hours after the surgery I got also additional pain medication. I never had severe pain after that or after the nerve block ended. I just took 2 Tylenol before going to sleep. I slept and are sleeping in the recliner. It is more comfortable than the bed for me.
I am doing PT and I can now do most of the things myself. I can raise my arm half way.
Hope this info helps.