about a week from today, I had a bad anxiety attack that kept me up all night trembling. I had 2 cups of coffee that day and usually I have at least 1 or two cups of coffee every day. The following two days I had headaches, fatigue, and was very tired, but I had consumed no caffeine. For the next few days after that, I had a few days of very bad anxiety (tension in the shoulders, fast heart beat, intense worry though for no real reason). I had diarrhea and sometimes when I went to the restroom, the anxiety got worse. Since the anxiety has subdued, I've been in a "blah" depressed mood for the last two days. Is this normal? because I'm afraid I've started something bad...what should I do?