What Causes Recurring Episodes Of Black Outs?

I am having passing out spells that I have had ever since I was six years old the last spell I totally went to a full black out was two years ago but I have very frequent spells of feeling like I am going to pass out and for 20 years I have been in the total dark of what is happening to me and what I can do to fix it but when I actually black out the syptoms are I start getting butterflies in my atomic then I ll get hot flushed like in the face then things start getting blurry my heart starts beating out of my chest then my hearing goes to like you are far away in a tunnel talking to me I get real weak tired sick to my stomach theni hear ringging in my ears then things start to get spotted and look like a blurry tv then gets hard to breath and chest pain then everything goes black then when I come through I am confused not sure what s going on where I am but I do know that I passed out but the ver first spell I fell back and hit the floor then I had a few spells that my eyes roll to the back of my head and I d be doddling back and forth and I had a few that I passed out falling foward as I was walking and then the last spell I had I passed out at the table and when I blacked out to where I didn t know anything and my husband said while I was passed out I got up and walked out the door and fell the dizzy spells my heart will pound fast and I will feel sick to my stomach and feel like the ground is moving under me like I am floating and ears will ring and if I get extream close to the full black out mode all the other symptoms start up til I almost black out do u have any idea to what the mystery is?????????