Help?

I feel like I’m not able to give myself an orgasm anymore. I have tried on numerous occasions and I can’t. I just start to get sensitive after a bit causing me to stop cause it doesn’t feel good anymore. Does anyone have tips to help make masterbation more pleasurable to the point of climax? I feel like I have a lot of stress built up and this is something I use to destress myself. I usually use my fingers and not really any toys. I have a vibrator but I haven’t used it in a while. Please anyone has any tips at all I would appreciate it!!