Midrin and my daughters birth defect

I have a 12 year old daughter that was born with Transposition of the great Vessels that was corrected when she was 12 days old and then when she turned 5 the cardioligist found that she had congenital leaky mitrial regurgetation and she has had 3 surgeries for that the third being placement of a stainless steel heart valve.I was very carefull about what I ate , drank or took while I was pregnant . The only thing that I did take was Midrin because I had severe migrains. Birth deffect do not run on either side of her families for at least 4 generations I also have a 22 month daughter that I refused to take anything during my pregnancy with and she is completely healthy. Could  Midrin be the cause of my oldest daughters heart defects? Desperately seeking answers ,Ami