Afraid I'll Fart or Pee if I Orgasm During Sex

Hello,

I am super embarrassed to even ask this, but ok I am 20 years old and I lost my virginity when I was 16, and I have had 7 partners and still none of them have been able to give me an orgasm, I have had plenty orgasms through the clitoris through masturbation, but never have I been able to reach one during intercourse through my g spot. I think I am just scared and do not let it happen, but I am sooo sexually frustrated.