Is there light at the end of the tunnel?

I try to stay a positive person even through everything that is happening in my life right now. I have to believe that things happen for a reason and even though things aren't going so well at this moment that there is a light at the end of this dark tunnel. It has to get better! If I didn't believe that I'm not sure I would be able to get out of bed every morning.
Today was just a rough day in general. I woke up with a migraine and the kids were misbehaving, screaming, and into EVERYTHING all day long. Tonight as I sit at home I'm feeling overwhelmed.

The light at the end of the tunnel seems like it is disappearing rather than getting brighter.