PLEASE HELP

I've never been able to orgasm... not with my ex (who was great in bed) or on my own. So I was just waiting until I got a vibrator cuz I figured on my own I wasn't doing it right... but I got one and got to the same point I would always get to with my ex... it would be amazing and start feeling like I have to pee reeaally bad and then it would just fizzle out and not get any more from there. I've read that that's kind of what it feels like at the start but it never goes any further and I just don't know what to do. I know it takes some people time but I'm kind of starting to lose hope... I don't know what to do. Somebody please help