Two mornings after my meeting with colonel , a visitor pounded at the kith hen door .. the noise near gave me a apoplexy . from this passage , apoplexy might mean

What the speaker tries to convey with the word apoplexy which is now commonly called a Stroke is that given the situation he/she was in was quite delicate, as soon as he/she heard a strong noise he/she was startled enough to think he/she may get a stroke or maybe its just a figure of speech and was used to express the state he/she was after the meeting with the colonel

i see, would you mind putting it as one?

google it and it will pop up