Orgasm???

So I don't really know if what I experienced was one or not so I'll tell y'all how I felt

So, when I masturbate obviously you get the heartbeat thing when I climax around my vagina, but when I feel like a reach my peak I start to like shake a bit like I'm paralyzed and can't move or open my eyes I just close them tight, an it lasts for 10 seconds or less. Of course it feels great but I just wanna know is this a orgasm or no?