My Husband Just Experienced Some Strange Symptoms. Earlier Today, He

My husband just experienced some strange symptoms. Earlier today, he was very faint at work, and became pale. He was able to rest in the office for a moment before returning to work. Just about minutes ago, he experienced tightness in his chest, dizziness like he ran a marathon. He said he felt like a bunch of weights dropped on his chest. and as he came back inside, he couldn't breath good. From my standpoint, he looked like he couldn't breath. He was very hot, but then got very cold all of a sudden. I checked to see if one side was drooping and if he could smile. Those tests came back good. But he said he was in pain after that episode. He said it was like a belt of sharp needles across his chest?