Suggest Treatment For Pressure Sensation In The Head
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Detailed Answer:
I read your question carefully and I understand your concern.
Judging by that description I do not think that episode was directly related to the antibiotic itself. Such an injection does not cause any symptoms, at times there may be allergic reactions but they manifest differently, with low blood pressure.
I think the episode was a panic attack due to an understandably stressful situation. It is common for the blood pressure to raise during such an attack due to the rush of catecholamines which justifies that sound you describe as well.
So these repeated episodes are also related to anxiety as well though not to the full scale of a panic attack. The fact that you are treated for depression supports that as anxiety and depression often coexist
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As for whether to call it PTSD or not, PTSD is in itself as well an axiety disorder after a traumatic event. However usually PTSD contains other symtoms such as flashbacks, memories and dreams of the episode. So I do not think it is a case of PTSD although as I said it is part of the same spectrum of disorders.
I hope to have been of help.