I Was Taking Serequel Then Got Switched To Zyprexa I've

I was taking serequel then got switched to zyprexa I've been having I've been having chest pain and read that fluoxetine and olanzapine can cause narrowing of the blood vessels of the heart I don't know if this is going on I have a echocardiogram tomorrow because of all the discomfort I'm experiencing but I think I'm going through withdrawal of Zyprexa I do not know if I should take the Zyprexa because I don't know if it's causing the chest pain issues or if it would draw is too much