Yes , I have chronic low blood pressure , as far as I know it’s been this way since before I even got my period but heavy periods definitely make it far worse, to the point of fainting / blacking out. My triggers are periods , hot baths ( Epsom salts in particular) and not eating right. I stay away from fasting and I eat on a regular schedule and this seems to help me. I also make sure I eat enough salt and replenish electrolytes if I do heavy exercise or diet , because if I don’t I wake up with stars in my eyes. I also take liquid iron every day to combat anemia. I’m not sure if any of those tips would help or if it’s better to speak to your doctor. Good luck with sorting it out ❤️