I think you are worrying yourself too much. Step back and relax a little. It is extremely important to be concerned about blood pressure, especially when it's higher than it should be, as in your case, however, when your anxiety causes it to be even higher, that's, of course, not good either. You need to find a way to relax yourself. maybe even see someone that could help you. Of course, continue to take your blood pressure medications and make sure that it is well controlled. If anxiety is playing a role, you may even consider seeing a specialist, and even taking medications that will help you deal with this problem. The likelihood that you will have an acute stroke from a simple rise in BP is low. As you stated earlier, it is the chronically poorly controlled BP that causes strokes in most cases.
165/110 may be unsettling but if that's only during the anxiety attack then the risk of having a stroke is very low. Chronic high blood pressure or malignant hypertension is the major risk factor.
When you work out, the sysolic blood pressure often go that high up to 200 at times. So, the risk of a stroke is the same as when you're exercising and when you're having a panic attack. The difference though is that panic attack doesn't help your health at all while exercise does and reduces the risk of strokes in the long term.
ask your doctor about the possibility
of prescribing inderal for your high
anxiety and fear.