Yeah, some days just suck for no apparent reason... often they're the most frustrating because it's so hard to put a finder on what the problem may be. I usually put it down to a whole bunch of little to middling things kind of welling up at the same time, it creates quite a dissonance. It makes sense for those things to show up when we think we should be good, they usually fade into the background when we've got the super bad stuff going on in our life - but demand to be dealt with when it seems to be plain sailing again.