Am I having a panic attack?

So I get anxiety over the littlest things. Today I was planning on opening up about my OCD disorder on Facebook so I could get it off my chest and it is also the first day of trich awareness week tomorrow. I was typing what I would say in my notes so I could copy and paste it first thing tomorrow morning. As I started typing, my heart began pounding, I got dry mouth, I feel all clammy and uneasy, my face is red, I feel uncomfortable and unrelated. I feel sort of lightheaded and zoned out, but I have a calm face laying in bed and not freaking out, like all the symptoms, but I am hiding my emotions. Is this still a panic attack if I look calm and and all my emotions and symptoms are on the inside? I have had two full out panic attacks before in school where I went insane, shouting and crying and I passed out, but now it is me casually laying in bed and if someone was looking at me, they wouldn't be able to tell I was experiencing all the systems. Is this a panic attack? As you can see in the picture, my face is getting blushed up and red