I can understand your feeling after thoroughly reading your question. Followings are my observations:
1) As you were under stress
for a finding a job, a fair possibility of the reading.
2) Please don't take your BP too often, as there are many pros and cons, about the machine, technique of taking BP. By too tight cuffs patients feel uncomfortable, and annoyed resulting in false high reading, this further increases stress, and a retake can be higher.
3) I think it was the wrong technique that resulted in this BP shoot.
REMEMBER: Always have a reading taken by a doctor or a paramedic, and not in that pharmacy or shopping centre.