I have two words for you:
Hold on.
Cry out to the Lord for help. He is an ever present help in times of trouble. Hold on.
Life can change at the drop of the hat. You do not want the challenges of today to deny you the joys of tomorrow. Hold on.
Don't cheat yourself out of something better down the road. Hold on.
Raise your eyes from your circumstances and look into another person's trials. We help ourselves the most when we reach down and lift someone else up. Hold on.
Don't rob yourself of the best moments of your future. Hold on!
When life kicks you down, take a brief moment to look around and learn. Then pick yourself up and start living again. Use what you learn to help someone else.
Please, hold on. Life gets better. One day you will look back on those lows and draw strength from having survived them.