Have you just slammed your door behind you?
Do not annoy this happens to everyone, at least once.
For doors simply slammed, so unlocked, whatever the circumstance and type of door -armored or not-, I guarantee an opening without destroying your lock.
If by chance my non-destructive opening techniques prove to be ineffective (some rare configurations do not allow the use of non-destructive methods.) I pledge not to charge you, so you have nothing to lose.