The marvelous Editorial Anonymous said it best in this post: just because you've sent your manuscript to one or two people, that doesn't mean your job is done. Don't just sit around now waiting for something to happen. Write something else. Research more editors, more agents. If you get feedback, revise and improve. And whatever you do, just keep submitting.
My challenge to you is to submit one thing this month: a short story or a poem to a magazine or an anthology, a picture book to an editor, a novel to a publisher. One thing.