Sounds like a difficult situation. I would be calling GI office to be put on cancellation list for NP or MD at their office. If there is particularly bad weather in your area, call the office the next day to see if last minute cancellation. I assume you are weighing yourself, if you begin to lose to much weight this could bump you up in the necessity to be seen. Also if you get scheduled for testing with biopsies, be sure to ask about getting moved up if cancellations. In this scenario I would strongly consider contacting a major center that does this research, like Mayo or MD Anderson. There are research nurses at these major centers that might be willing to look at your online records, see the necessity of getting a comprehensive approach sooner rather than later, and get you in. I would start with the neuroendocrine cancer research department. These large best practice centers tend to have a much more streamlined approach. If the large hospital systems are out of reach, then you have to have evidence enough of a reason to be admitted to hospital which could be electrolyte imbalance if there is enough vomiting, diarrhea or lack of ability to eat(typically decided in ER). Other reasons ER may agree to admit is significant intractable pain, weakness to point of a fall, other labs that are way out of whack, any report of change in mental status gets their attention. ERs follow what insurance will allow, insurance is in charge of healthcare, make no mistake there. Once you get into hospital, they will add on testing which is what you need for diagnosis, consult specialists, perhaps a surgery while there. I hope this makes sense. Am retired RN of 40 years. Here is one more idea but expensive- there are "concierge" PCPs out there. You pay $3000-7000 per year but their practice is smaller and they can be wonderful advocates, perhaps smooth your way into the large treatment center. Maybe only need them for 1 year so you can get through the system to diagnosis, plan of treatment and hopefully feel better sooner. I have told friends the hardest situation in your health is when they don't know what is wrong. I have been there before with a cyst in my pancreatic duct and I worked at a hospital. Best of luck to you if this seems overwhelming, perhaps a family member or friend can help get phone numbers or be there on speaker when you reach out. If have any RN friends, call them. One other thing and this is more information gathering but go to clinical trials.gov to see what centers are very active for (suspected) neuroendocrine cancer. I am a cancer survivor, too. Wish I could reach out and give you a hug.