I recently concluded that I definitely have an anxiety disorder along with some depression and being a hypochondriac (thinking I have illnesses that I read about.) I have been worried about a specific illness for about a month now and it's driving me crazy. I have never been so stressed that I can remember. Stress can do some crazy things to you. What you have sounds exactly like swollen lymph nodes/glands in your neck, also can be in groin and armpit. This can be an indication that your body is fighting off an infection, such as mononucleosis (which I just got over lol)... But I feel also that stress can cause them to swell. I wouldn't worry unless they remain large. Good luck :d