I am worried about my low bp being serious, when I feel good, it is usually 105 over 60, but as soon as I feel tiered, and when I stand up from sitting my vision goes black, I also have irregular heartbeats, I check my bp and always one of the two is low if not both, ranging from 92/58 to even 80/42. I know this is not entierly normal, but is it serious to where i need to make it a priority? I know my health is a priority but right now I don't have any kind of insurance, so I want to have an idea on what I am dealing with. oh and I am a 30 year old female, thank you for any feed back.