You can still get the stimulus, but not until your 2018 or 2019 officially goes through with the IRS. The good news is there isn't an expiration date on getting your stimulus, so even if it takes months to get this settled with the IRS, once you do, the stimulus will process.
That doesn't help you immediately of course. But just know your stimulus won't just disappear. It will just be set aside until they have current enough information to know where to send the money, either direct deposit or in the mail.