Welcome to the Club, @Potter_21 - it is not the club you 'wanted to join' .... but like us, here you are! Here, you'll get honest advice on every subject - big & small. Don't be afraid to ask about ANYTHING!! No subject is too big or too small. xx
All the best for tomorrow .... a small cushion/pillow helps with supporting your arm after surgery & in the car on the way home! (Any bump is rather exaggerated in the early days!). Hugging the cushion helps prevent the vibrations/pain!
As @Dory65 said - make sure you take the pain meds (whether you think you need it or not) and it will help your recovery.
Take care & all the best for your pathology results xx