Erin's marathon

So... now I'm mad.  I weighed myself this morning and I actually gained a pound back.  The sad part is I don't understand why.  I have been tracking all my eating and my exercise and the numbers say I should still be losing.  What the heck is going on?  This is exactly why I never stay on any weight loss program.  I feel like all that work was for nothing.  Well, here we go again.  Lets see if I can do any better this week.  Maybe I shouldn't have so many calories at night?  I don't know, thats the only thing I can think of.