Is this a Panic Attack?

This happened to me today and yesterday its hard to describe the feeling though. I had sort of a dejavu(spelling?) Moment but I dragged on for like twenty seconds. I can't really describe the feeling but my chest felt like it was bring squeezed v very tight and it felt hard to breathe. My body felt very hot and I could not focus my thoughts and felt extreme confusion and worry. It felt like something horrible was happening but I couldn't understand it. I just remember having this horrible feeling that I really can't describe and felt like it was impossible to stop.

Is this something like a panic attack? It has only happened twice the first time I was eating and the second I was paying a video game so Iwasn't around any strobelights or anything to cause it. Are panic attacks serious?