Is this what an orgasm feels like?

Hey ladies. So I am 20 years old and still a virgin! Waiting on marriage. I started masturbating this year and to be quite honest, I'm not sure if what I am doing takes me to a full orgasm. I go at it until I feel this flooding sensation but no liquid comes out (I thought it was supposed to). The sensation lasts only a few seconds. After that my whole body gets tired and I kind of feel turned off. Is what I'm experiencing an actual orgasm?