What Causes Headaches Accompanied By Nausea And Vomiting?

Hi, I am really just contacting you to see if you may have any suggestions. My stepdaughter suffers from constant headaches, usually accompanied by nausea and vomiting. These headaches are not just once in a while anymore, they seem to be probably 4 out of 7 days a week or more. She doesn t have a life anymore because of her health. She has been diagnosed with fibromyalgia and much has been blamed on that but she is of course depressed and on medication for that. She sees a gastroenterologist for stomach and intestinal problems, a neurologist for headaches, etc., a rheumatologist for fibromyalgia and then also has a regular doctor whom she sees for anything else. She has all kinds of other symptoms and is on multiple medications. I have wondered if any of her multitude of problems could be attributed to some kind of connective tissue disorder, since there are several family members with these conditions. I have also wondered if anything could be attributed to mold or carbon monoxide poisoning or lead poisoning. I guess what I am really doing is grasping for straws but no one seems to really be helping her. They just prescribe medicine and do tests and everything always comes back normal or just something that she ll have to live with.. Any suggestions or opinions?