How Does Taking Pre Workout Cause Changes In BP Levels?

Hi my name is Dan and I'm 19 years old. I've taken preworkout when I lifted as I have been over the years, after one lift my blood pressure was 189/110 I went to the ER and I'm fine now. Couple months later I took it again, after I felt the same, but not nowhere near the first time. I went to the doctor an he said I'm fine and no to take any more supplements like that, I'm not going to anymore. My question is am I ok? Will my heart be ok? Lastly, should I not worry and just forget this happened or ATLEAST try because the more I worry I feel that I get a weird sensation over my chest.