depression
"I was at a breaking point and couldn't take any more bad thought and sad days. It got to the point where I was crying up to 4 times a day, snapping at my husband and kids, having to call in to work because I couldn't pull it together long enough to function.  It was bad.  I had negative thoughts and obsessed about something bad happening to myself or my daughter and not at the hands of myself.  
Side effects were bad at first-insomnia, nausea, swimmy head, anxiety, those only lasted until about day 5 and was told to push through and tough it out.  Every day since has been better and better and I finally feel normal again.  Lexapro saved my life."