Some girls just can't get to O from penetration alone. Invest in some toys like a basic dildo and a "bullet". The bullet is small and powerful and if you put it on your clit, you will have massive orgasms real fast. If you have some extra cash get a vibrator like the rabbit which you can put inside you and it has "ears" which will get your clit at the same time. Some have dual speeds so you can get what you want wherever you want it.