Orgasm

I'm 26 and still have not been able to successfully have an orgasm. I can't even get myself there through masturbation. Does anyone have any suggestions or feedback on this? I really want to experience orgasm and know it would help with baby making. I always try to relax, stay in the moment, tell my SO what is and isn't working, and he takes his time to try to get me there. What am I doing wrong? What will help?