My car stalled and now wont start 1990 buick regal?

i was driving my 1990 Buick Regal and it stalled. It started back up in neutral and got me where i needed to go. when i got back out to leave it wouldnt start.|||if it stalled it could be the alternator. just get it checked out first.|||Fuel pump I had that same problem ...|||Maybe the fuel pump...