I'm so sorry you're feeling like this. I went through something very similar 5 or so years ago. I did finally go to the doctor after much too long in hindsight. She asked all the pertinent questions to rule out medication side affects, pregnancy, etc., and put me on a mild anti-depressant for 3 months. I did make a few other changes while I was on them (new job which was my major source of stress and anxiety), but I don't think I would have even had the drive to do that had it not been for the improvement in my overall mental state as a result of the medicine. After 3 months I didn't have to take them any more, and just made sure I maintained some constant, healthy outlets for stress and have been great ever since. Just be reassured, you're not alone and you can feel happy again - promise.