Please Help- I Dont Know! (different Orgasms?)

I seem to only know when I orgasm when im on top and it hits my g spot, and usually ends with me gushing fluid. Which isnt bad, my bf loves it and it feels awesome. But isnt there a difference between a g spot orgasm and a regular one? I read that somewhere... And if there is a difference, how can I tell if im having one. I feel so embarrassed by asking that but I need to figure myself out before I get too discouraged. It seems like the g spot stimulation is the only thing that satisfies me. Please help!!!