Orgasm: Masturbation vs. Penetration

Lindsey
Just wondering if anyone else has this problem - 
I can orgasm nearly every time I masturbate, but I usually always have to be in the same position (laying flat with my legs straight). I also can never directly touch my clit. I have to do movement and pressure more just in the general area. 
So when it comes to having penetrating sex in different positions, and usually not fooling with my clit, I can never orgasm. Has anyone else experienced this? And if so, do you have any tips on how to fix this/do something different?