constanst tireness weekness in my bones , no energy very short of breath, with any bit of exertion . its not my heart as i had that test done,and there are no blockages,and as i have to wait until sept for the results at the out clinic i am worried as my problem seems to be getting worse . only yesterday i was doing the lawn and while pairing along the edge with the spade i went faint a rainbow and bright lights appeared in my eyes for a few seconds and i had to grab hold of the pier to stop from falling what might be the cause ? sorry i cannot afford the cost. but thanks all the same