No problem. Realistically, I went into nursing school doing my damnedest to avoid anything poop, mucous, or vomit related. I would have trouble not gagging, but I put on my game face because I didn't want to embarrass the patient. I literally dreaded having to deal with any of these things, and hated clinicals like the plague. So I disagree when people tell you that if you feel this way that nursing may not be for you. I think it's ok to feel this way, and I can tell you as someone who felt the same that once you start working, these kinds of things will become pretty non-important to you.
Instead of being disgusted because a patient had diarrhea or vomited all over the bed or themselves, you'll ask yourself what made this happen? Why were they incontinent or is it a sign of some other issue? If a patient has thick mucous, you might still be grossed out but the overriding thoughts will be keeping their airway clear or how you might be able to help them get relief from the problem. You're never gonna love poop or mucous (once I almost made myself vomit while using a yankauer to suck a huge booger out of a vented patient's nose), but it will become a non-issue.
Once your assessment and clinical skills are developed you will see these things as clues to a puzzle and not as isolated, gross events. This is the difference between a person who asks how much poop they might see in a day and a person who asks why they see that particular color of poop on that particular patient today.
I have found a lot of positive on this site, but I have seen more of a tendency of people to jump on others when they show any sort of weakness. Don't let it affect you if you truly believe nursing is what you want to do.