There is always something better on the horizon anon. We all have low periods in our lives, and while in those periods rarely see what is beyond them and find it hard to gather the strength to pull ourselves out of them.
Take each day as a new day. Don't look back on what has happened in the past, you can't control that - it can however control you.
You are in control of now, and where that will lead you in the future.
Don't dwell on things, just try to focus on finding new ways to make each new day brighter and better than the last.