Sexual pleasures TMI

My boyfriend and I have been together for 4 years. He’s always fingered me very well but I’ve never reached satisfaction. Today he did it for awhile like he’s never done before. My body started shaking and it felt like my eyes rolled into the back of my head. It felt electric through my entire body. I got scared and had him stop. I could feel something building up ready to leak. I’ve never felt like that before. Is that considered an orgasm? And after, sex was better than we’ve ever had, which it’s always been amazing but we were both like, wow.