Im 18 years old, female I have anxiety but for the past few weeks, I have not been able to keep down food, I get really nauseated, lots of pain in my upper/middle back as well as pressure in my chest. I usually have insomnia but lately all I can do is sleep. My heads filled with pressure. My resting heart rate has been up to 120, ive been to the doctors plenty of times, and everything seems to be normal. I am 5'6 180 pounds and I do exercise on a daily basis. 4-6 times a week. Does anyone have any idea what could be wrong?