Take a less direct route! You’re getting down to business too fast. Stop going straight to your clit and start by playing with your breasts, just teasing your clit, making yourself want it so much before you even let yourself touch. Then just do it through your panties at first, before you finally slide your hand inside them.
And then alternate, between pussy and clit, your other hand still working on your nipples, building all the time, keeping your breathing steady to control your ascent.
And then, when you reach the edge, practise ‘riding’ it, staying on the edge without going over.
It’ll be worth it.