Happens to me too sometimes, I think it's more likely when I come too quickly. I might have also ruined my body by having consecutive orgasms too often, now the first one rarely feels satisfying at all. Maybe try to masturbate less? I don't know if there's any real benefit to female 'no-fap', or doing it less, but it could help.
Maybe try retraining your body to respond to sexual touch by edging, which is stimulation until almost climax, but just stop all touch and letting the build up fade, then repeat. When you finally let yourself orgasm, it should be more intense?