Cliteris simulation Becoming to much

Okay so when I masterbate or even durring sex cliteris simulation feels great for like 5 minutes and then it starts to hurt and becomes to much,if that makes sense and it sucks because I can never finish and my bf wants to eat me out but can’t because it always starts becoming to much in a really short amount of time. Does anyone else experience this? Can I do anything about? I have tried looking this up and can’t find anything on so if any of y’all can help please do!!