the good thing is that you can orgasm by yourself. that tells me that nothing is "broken" with you.
most women can't have an orgasm by penis in vagina stimulation only. you're not alone. there's nothing wrong with "helping things out a bit" and rubbing one off while being penetrated. frankly, i enjoy this.
the oral thing is harder to fathom, but it's mental (at least in my opinion). women have a hard time sometimes "letting go" and giving up control over their orgasms. there are so many things that enter our minds when a guy is going down town on us. all of those things can be a total buzz kill (or orgasm kill). what you have to do to overcome this is to "clear your mind beforehand, and let yourself go" during the experience. don't analyze what's taking place, just let it happen and focus on how good it feels instead of one of 1,000 other distractions that tend to jump on us ladies.
good luck. jasmine