I Had Two Large Stents Put In One Artery 5

I had two large stents put in one artery 5 days ago and I am having chest pain again. I don't understand why. I had open heart surgery in 2010 and haven't had any problems until now. I had a major heart attack six days ago but didn't go to the hospital until the next morning. Now in less than a week I'm hurting again. What do you think the problem is or is this normal?
If I had known I would have to pay for an answer, I wouldn't have bothered. It's always about the money and not about helping people.