I can't handle poop

Hey Dads I am about to join your ranks in a few weeks and I feel about as prepared as I can be with one exception. I have the weakest stomach. I clean up the dog poop in the backyard and end up puking on my lawn almost every time. Someone rips a wet one around me and I am gagging. I am terrified of changing diapers and potentially puking on my baby girl. Anyone have any tips/gadgets/ideas on how I can overcome this shit?