Can’t tell if I had an orgasm

I’ve never came from somebody eating me out, only from a vibrator. So I really don’t know what that type orgasm feels like if that makes sense. I just know it feels different. My bf was going down on me and it felt like it was right there for the longest time. My legs started shakin just a lil and then the feeling kinda went away and then we stopped. It didn’t feel like a full release if that makes sense lmao. It just felt like I was really really close and it kept building up and it just went away. It did feel really good. Idk how to fully explain it. I just can’t tell if I came or not.