Many women become "efficient" in reaching an orgasm in a certain way, thus making it hard to reach it otherwise. The issue, believe it or not, is mostly mental. When the brain gets used to the response, it gets "set" on it. Therefore, next time you have sex, you "block" any other way of reaching orgasm.
You can learn to reach orgasm in other ways but it will require that you de-program yourself from how you orgasm already to learn new ways of climaxing.
Some advice:
1. Relax: Stop concentrating on coming and enjoy the experience during sex.
2. Self-pleasure: Masturbateto explore and learn more about your body and pleasure zones. Instead of rushing through masturbation to reach orgasm, focus on finding out what else pleasures you. This will take time. Be patient.
3. Clear up your mind: Do not make sex about “coming… coming…coming… can't come… will not come… OMG-won't ever come!” Stay positive and say to yourself that you will be open to new things and the pleasure of sex.
4. Be open-minded: Try many approaches, for instance, watching some porn or reading erotica before the act. Use your imagination and let your partner use his or hers. There are many toys and clitoral stimulators in the market to help you.
5. Discover all the different types of orgasms: Different orgasms feel differently and many women fail to recognize them because they only credit the clitoral orgasm as such. Women have the capability of coming in many ways. Try to ejaculate, for instance.
6. Warm up: Make sure you are very aroused during the act. If you have "orgasm anxiety", you are not going to be fully aroused during the act. So, again, relax and let your whole body be aroused, not just your clitoris.
7. It’s not over until it’s over: Sex does not have to end when your partner comes. In fact, sex can be foreplay for orgasm. So if you want to reach one (or many) orgasms, continue to play – with yourself and/or assisted - until you are done. Don’t think you have to come before or at the same time your partner comes. And your partner should be able to be a willing and active participant in your orgasm even after he or she has climaxed.
Remember that the most important sex organ is the brain. Do not get on its way! Of course, if orgasm continues to be a difficulty, you should get professional assistance from a sexologist so you can be coached into reaching orgasms in many ways.
Photo: http://homeguides.sfgate.com/DM-Resize/photos.demandstudios.com/getty/article/189/230/57443043.jpg?w=600&h=600&keep_ratio=1