Emily,
You may indeed, need a change in your medication! I am medicated for chronic depression. I have been medicated for years and years. I take an antidepressent and have had to switch or raise my dose (or lower it,) depending on what is happening in my life.
You need to do the same thing. My closest friend is a Psychiatrist and he would tell you to come in for an adjustment.
Don't suffer through it, hon, just make that appointment and get some help to cheer up for the holidays! Let the medication help you! We have a simple disease that is controled by medication, just like diabetes! We need to take care of ourselves with great care if our mood drops..
Don't be shy about it or ashamed or anything, just go and help yourself to what you deserve, a very merry Christmas!

Please tell me how you are, ok? I'm right there with you and I understand, You must NOT bear this, you know that!

friends,
dancer9