doggy style

so whenever me and my fiance do it doggy style ( not in my butt lol ) I still feel like I might fart or like I have to poop and I'm so afraid I will so I cant even enjoy it . and I'm also worried about what hes seeing . like hes looking right at my ass . what if I didnt wipe well enough ( which I'm pretty sure I do lol ) i just cant get these thoughts out and enjoy it .... any tips ?!