Hi, I am a 23 year old female who has had low bp for a while. My normal bp is usually 100-110/50-60. I have a number of concerns. First of all, when I stand for long periods of time, I feel faint, dizzy, nauseous, and often black out and start sweating. I need to sit down or lean against something in order to not faint. Also when I have been sleeping, and I get up in the morning, I will have the same symptoms. I have been taking my blood pressure and during these episodes, my blood pressure has usually been between 80-90/40-50, and my pulse is racing, between 110-130bpm. I have also recently been having chest pain, minor, but there. Even as I sit here, resting, my chest hurts. A tight sharp pain. Is this something that can wait? My doctor can't see me for another two weeks...