Reader of DubiousQuality wrote in on this topic:
Finally, about 20 years ago, all 3 things converged at once. Depression, anxiety, and panic. I suffered for about three weeks. Could not sleep, could not eat, I was barely functional. I suddenly realized I was like a drowning victim. I felt like I was being pulled under and that my system was being pumped full of adrenaline. I felt the fight or flight instinct, but there was nothing to fight or flee from but my own mind. At that point in my life, I had a rather poor opinion of psychology as a science, but I realized I needed help. via dubiousquality
Hmm, interesting. The stress for the past months sounds eeriely similar.