masturbation..?

Hannelore
So, this is kind of a weird question I have. Just want to see what everyone else does...
So, I've never actually been able to orgasm during masturbation by just laying in bed and teasing my clit, like everyone I've talked to has. No matter how long or how hard I try, I can never peak, I even tried for 30 minutes straight one night. I always give up in tears of frustration. 
The only way I can successfully orgasm during masturbation is by basically sitting on my hand, using two or more fingers, and grinding my g-spot until I hit climax. It's frustrating for me because it goes so fast that way and I want to enjoy myself but I've never been able to orgasm simply by laying down and touching myself, I have to sit up, and grind.
It's such an awkward thing but I'm starting to get very frustrated and wanted to see if anyone else has somewhat similar issues, perhaps?