I would not expect any significant blood pressure change with your period. I suppose if you had a huge and sudden blood loss it could affect it but your menses loss is minimal, even though it seems like quite a lot. If measured, it is actually 10-80 ml. in volume - not enough to make a difference in blood pressure.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN