I am sorry to hear about the struggles, and I pray that things get better soon. Talking with your physician on Monday seems like the best option. Some of what you describe could be muscle deconditioning from disuse during the recovery from the level of the abdominal core to the shoulder, arm, forearm, and hands. All of the above may be involved. Also, there are some medications given after surgery such as muscle relaxers that can interact with other medications leading to side effects of tremors. Ask that your medications be reviewed for side effects and interactions. Hoping for a speedy recovery!