This is absolutely terrifying ... we really feel for Sandra Bullock!

The stalker who was arrested for breaking in to Sandra Bullock's Los Angeles home in June came right to her bedroom door, according to new court documents. We knew Sandra was home at the time of the invasion, but this is far scarier than anything we (or the Oscar winner) could have imagined.

Around 1am Bullock says she heard a loud bang inside the house, and when she went to her bedroom door to close it and lock it, she saw Joshua Corbett IN HER HALLWAY. Corbett was wearing dark clothes, and Bullock also told cops she had showered before going to bed, so Corbett could have there since she got home from an event earlier that evening.

When the cops arrived, Corbett began screaming, "Sandy, I'm sorry. Please don't press charges," and he was carrying a notebook magazine photos of Bullock and several handwritten notes, one of which read, "I will forever be thinking of you and Louie, my son, as you are my wife by law, the law of God and you belong to me and me to you."

Bullock was granted a protective order against Corbett, and police obtained a warrant to search through the many weapons in his possession, and what they found is chilling. Cops found SEVEN guns at Corbett's home -- including assault rifles -- and according to TMZ, they believe there are more!

Corbett was charged with felony counts of residential burglary, stalking and possession of a machine gun last month (the above footage appeared on Good Morning America), and in he's since been hit with 19 additional charges for possessing machine guns and other weapons. Corbett has pleaded not guilty to the charges and bond has been set for $185,000.