You're at the end of a chapter, and nearing entering another that hasn't been written yet. You're facing an empty future, because you haven't filled it yet. This can be a difficult time, but also a great time, because you are about to go somewhere you've never been before. Don't worry so much about having it all mapped out. I'm nearly 43 and still don't know what I want "to do with the rest of my life." I don't think anyone, at any age, has it all dialed in like that, and I think if they did, they'd be pretty neurotically fucked up.
Just know that you want to move forward, and let the path come to you. Life really does work that way. Things have a knack for coming together. You just have to be open to it. Embrace the unknown as a blank canvas upon which you can paint your whole life, then paint over it if you like.
Hope that helped.
The Rev