Can anxiety cause back and abdomen pain? I also have a hiatal hernia could this cause sharp chest pain? All heart test came back normal.

See below. Anxiety can have many effects on the body such as those you have described. Best to rule out conditions that can put you at an immediate health risk and then seek a psychiatry referral. http://www.ncbi.nlm.nih.gov/pubmedhealth/pmh0003695/.
Yes. Anxiety tends to aggravate existing pain and your areas of discomfort are typical. See a cardiologist to rule out heart illness.
Yes. Hiatal hernia can cause chest pain, but so can reflux, and esophageal spasm. See a general surgeon with experience treating gerd or a gastroenterologist for a consultation. You may need some tests to figure it out.