The word “after”

The word “after” requires 2 pieces of information.

… and after supper, I went to bed.  ✔︎

… and after I ate supper, I went to bed.  ✔︎

… and after eating supper, I went to bed.  ✔︎

… and I went to bed after supper.  ✔︎

… and I went to bed after I ate supper.  ✔︎

… and I went to bed after eating supper.  ✔︎

… and after I went to bed.  X  (This is wrong, because the listener is waiting for the the 2nd piece of information, for example “… and after I went to bed, there was a loud knock on the door.”)

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… and then I went to bed.  ✔︎

… and afterwards I went to bed.  ✔︎