My body is sore and aches, feels like I exercised intensely but haven't. Stomach is hard, bloated. Could this be caused by anxiety or what else?

Anxiety could be. behind some of these symptoms; however, the hard, bloated stomach is atypical. Check this out with your MD first to r/o physical causes, then see a mental health specialist for the psychological part. In the meantime, learn about anxiety, just in case... http://www.psychologyproductsandservices.com/page2.html.