Recent Heart Attack-Very Confused

Hello everyone this is my first post in this forum and just wanted to tell my story and get some possible advice on medications, lifestyle, etc..  I am a 33 year old male and was told this past weekend that I had suffered a heart attack.  They checked my arteries and I was told that they are 100 percent perfect and there is zero buildup in them.  I was also told that my Blood Pressure is good but very low, my Cholesterol is great, I am not overweight, I exercise daily, and also I dont have a lot of stress in my life.  The doctor told me that he really wasnt sure what happened but he suspects that one of my arteries went into a spasm and that is what caused the Heart attack.  It was a real shock but I accepted it and was ready to do what I had to do to heal.  The Doctor put me on Coreg, Norvasc, and aspirin.  The problem is he told mew not to take the Coreg if my BP was under 90, and not too take Norvasc if undert 100. My BP has been averaging about 85/55.  So I have not taken any medication except for 1 time.  Either way when I read about the medication they say they are for hypertension and not to take if you have low BP.  I feel as if I am going to do harm taking this medication. 

Hello and welcome to the board..I am a lot like you in that my heart attack wasn`t caused by any of the typical indicators..I was in great health..Exercised regularly, ate well..My cholesterol and BP were excellent..In my case I had a blood clot from hormone therapy..Anyway..I think what happens is that doctors are so used to people always having some sort of diet or health problem that causes a heart attack that they automatically treat you for things you might not need..Did you suffer any damage to your heart that they mentioned?..Did they put any stents in?..How long were you in the hospital?..I know it`s scary when you first get out and you have a lot of questions and concerns..Let us know some more info and I`m sure we can put your mind at ease

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 Thanks Sara and Patoolla.  Tomorrow I am seeing a Cardiologist who is well respected so hopefully he can answer some of my questions and relieve some of my fears.