Yeah, It sounds like your cycling. Is anything going on in your life that may have brought this change on? It so...give it a little time for you to adjust to it.
I have days like that too. Sometimes I just comfort myself a little more on those days. I'll hold off on all the housework, just relax and catch a few good movies on T.V. of spend some time on some of my favorite things. Sometimes that is just sitting on my deck with my radio and a cup of coffee or iced tea and just relaxing.
Otherwise if it continues to linger mention it to your doctor. He may be able to help with a tweak in you meds for a little bit.
Hang in there! 