Amy

Not only do you tell the doctor you want a second opinion on what option (hospice or chemo) or other treatments, but also remember that the burden is on him of sending the tests etc to the new doctors and ask when he plans to do it. It helps if you can have a third party in there with you on Tuesday. There is no rationale reason you need to decide Tuesday. Some places do second opinions on line but you may have a tumor board right there in the hospital. Finally, cutting you off of pain medication is highly unlikely due to liability and license issues as noted by other posters. If anything, he should be giving you a patch.
Good luck and best wishes
Charm