have you had your bloodpressure checked?mine is also hereditary.but infact stress can raise it tremendously my aunt used to have low bloodpressure but she has been stressing lately and now hers is borderline high.
My blood pressure is fine. I think it was due to me having terrible breathing techniques because I knew next to nothing about lifting. I've never had the problem since and I lift with 100x more intesity now than I did then.