My daughter passed out a couple of months ago, also was shakey, headache, nausious, tired all the time,. Dr said her ion was to low (12) to put her in supplements and have her checked again in 3 months. In the meantime she has started to have pains in her left side of her chest only in one spot. The pain can come on when she is just sitting still and relaxing and when she is active. It only lasts for a couple of minutes and can be so painful it doubles her over, sometimes the pain isn t as severe. It comes on at least 3-4 times a day and this has lasted for about 2 weeks now.