Battling Self-fulfilling Prophecy

I haven't felt 100% at all this week, and this morning was worse than the others. A little voice in the back of my head said I wasn't going to make it through the day. I just have the all-over yucky feeling I always seem to get right before I get sick. I've been working hard all day to not fall victim to self-fulfilling prophecy and let that little voice win. I've been keeping my head up and working hard to not believe what that that little voice is trying to make be believe.