Need Help Moving a Scene

Hello, I don't normally write fiction (i'm a non-fiction writer), but I started a story about two months ago. The first three pages just came out really quickly, but now one of my characters is stuck in a diner and I can't seem to get her out of there.

Brief synopsis;

The story is a thriller/suspense. In the opening scene, a loud scream comes from an alley in the inner city. Three friends were hanging out on a street corner and heard the screams, but later on, a naked woman with blood curdling down her face ran towards them. One of the women (Lola) noticed that it was their friend, Rachel. She (Lola) sent the other character to a diner to get help. The character walks into the diner, becomes paralyzed with shock, and informs a waitress that her friend needs help. Meanwhile, the other character, Lola, is still with Rachel (the bloody character).

I can't move my character out of the diner or move the scene along. Do you have any tips?

I'm sorry, that should read: I can't move my character out of the "diner" not dinner.

Thank you all for the great advice.

The character in the diner (I still call her "character" because I haven't decided on a name yet) did try a pay phone but it didn’t work. That's when she ran into the diner. They are in a big city where most of the street phones don't work (especially in a bad neighborhood).

Lola (the woman outside with bloody Rachel) had to tell XXunknown nameXX to run for help. She was in shock. The character is weak and suffering from multiple personality disorder, but no one knows it at first.

In the end, there will be revelations about the "no-name character". She will turn out to be the serial killer who is preying on these women, but with a twist (she's not really a she, she's a man in drag, but she has them all fooled). So, her dazed and confusion state is when she switches personalities, but doesn't know if she committed the crime, but she thinks she did.

Why do I keep typing in "dinner" and it's "diner"