It sounds like you have a lot of connective illnesses. For example. Your weight gain, foot swelling, constipation, could me Medication. Some medications are noted for making you gain weight. Too much laxatives can cause any number of repetitive problems (non of them pleasant). Have you tried stool softeners? (ask your doctor about these) it is my understanding they can be taken on a long term basis, but you have to be sure they are not interacting with someother prescription Medication.

I think you present with SO MANY PROBLEMS that the doctors think (mental health problems) and go on to the next patient. I would suggest you write the list as previously suggested, but pick the one that is giving you the most pain or problem NOW. Try to get a disagnosis and treatment for that, and then go on to the second. Many, many years ago I worked for an Internist who was great, BUT, when we scheduled appointment they were normally for 30 minutes. He was always late, and patients would complain. His answer was always the same "I had a patient who needed my special attention today, next time it might be you".
Gina5009