I started running about two weeks ago and everything went well at first; however the last few days I have increased anxiety upon waking, so much that it causes vomiting, for no particular reason. Also I feel more depressed now and lack motivation, for an unexplainable reason.
I assume the anxiety is caused by running since this has never happened to me before, and running is the only change I have made in my lifestyle recently. Also there is nothing in my everyday life about which I worry so much as to cause anxiety.
I started running for health reasons and I never exercised for more than 30 minutes.
My question is, is it possible for running to cause anxiety and sadness?