Feeling nauseated & getting headaches

Associated with eating. Low blood pressure and high heart rate. Very tired after just 1/2 cup of food. Vomiting a lot. Doctors say I have vitamin D issues, chorionic migraines, gastritis, gall bladder issues with gall stones, & ovarian cysts & endometriosis. Bursitis of the hips. & trouble with low blood pressure. Anyone else experience all this & what did you have?!