Bad Orgasm?

So this has been happening a lot recently. when i masturbate the build up is so good when i finger myself and stimulate my clit, but when i finally orgasm i feel disappointed because it doesn’t even feel good? i can feel myself reach the peak but it doesn’t feel good it just kind of goes down, sorry i’m really bad at explaining it! is this normal or how can i go back to the way it used to be because i miss that ecstatic feeling 😩