I am sorry maybe get the Doctor to prescribe some meds to help lower the blood pressure, I expect you have had counselling , some find that helps ,speaking it out does also help some , you have made a start posting here could you relate further, you have found friends here ....
While I don't think it is directly causing hypertension, I found psychcentral says PTSD can make a person prone to hypertension. Your blood pressure ratings are through the roof, are you taking a medication for it? I too have been diagnosed with PTSD and have usually high blood pressure but mine is nowhere near that high and seems to fluctuate. Are you on medication for the PTSD as well?