Don't stop writing, or planning writing. Write a little every day or when you can; if you can't, think about what you want to write. And don't be afraid to let the writing move you. Everyone ends up writing a lot of stuff, and not all of it will be used; don't feel you've written crap and give up.
Every word is a step on the journey to the story flowing properly, even if it's just practice, and you never know when you might find a use for what you wrote.
Persevere and believe in your work; be exact and stern, but don't let people tell you you are worthless. Better yourself and take constructive criticism wisely, and let the writing move you.
And get trustworthy opinions from people you know will tell you the truth. You can never judge your own work fully... it's hard to navigate when you are too close to the sun.