To make sure I've got things straight, are you noticing a lot of ejaculate (which accompanies orgasm), or is it that you're noticing you have a lot of vaginal discharge?
Either way, there isn't a ton you can do to limit how much vaginal discharge you get or if/how much you ejaculate. Those are bodily responses to stimuli (and things that can fluctuate due to what else is going on in the body), rather than things we can turn on and off. But if you're noticing the amount of lubrication present is making it harder to orgasm, can you give me a sense of how much you've experimented with different ways of masturbating?
As for farting during sex, other than avoiding foods that make you gassy if you know you're getting sexual with someone that day, that's one of those things that we just have to accept happens. Human bodies give off all kinds of scents and sounds during sex, including some that we feel aren't all that attractive. But part of being ready to be sexual is knowing that if that happens, you can shrug (or even laugh) it off. Does that make sense?