dehydration can be a cause of low blood pressure try upping your water but go get checked by docs
Add extra natural sea salt in your daily diet ASAP to get out of the danger zone!
Make an appointment to see an Endocrinologist.
Blood pressure is regulated by hormones Aldosterone, Corticosteroid ,
Vasopressin, Renin , Angiotensin & Norepinephrine.
Something is dysregulated in your Endocrine system!
Hope this helps,
Niko
i cant say why but i do know that viruses can get into the bone marrow and affect production of blood both red and white cells also cancers some viruses can cause im not sure what other conditions could cause it or wich part of the body promotes blood production in the bone marrow . what does your dr say ?have you seen a hematologist?