I came across a large chart in a book the other night, explaining all the various symptoms of pregnancy along with alternative explanations for these symptoms (i.e. if you're not actually pregnant). I found it rather amusing (maybe that's not really the right word for it) that almost all symptoms could also be attributed to stress. For example:
Symptom: Menstruation ceases
Causes: Pregnancy, increase in physical activity, stress
Causes: Pregnancy, illness, stress
Causes: Pregnancy, vision problems, stress
So for those of us who've spent a good deal of time feeling stressed, pregnancy should be a breeze, right?