It sounds like you are not viewed as an orientee, who should have a limited assignment. You are being viewed as a full-fledged, flying on your own, staff member. Put a stop to it AT ONCE. YOU put a stop to it. Let me repeat that so you understand that YOU must put a stop to it. If YOU don't, neither will they. Take your boss aside and share with her what you have said here - a different preceptor every day, unlimited new patients, no breaks, even to urinate or, I'd bet, swallow some water. Let her know that you are not ready for the full load yet. Although I am wondering why not, to be honest with you, if you have already been there for 6 weeks. I personally think it takes a full year to be fully competent in one's job but it does seem that you would be off to a pretty good start after 6 weeks. Maybe the constant changing of preceptors has really hurt you. Maybe the being treated like a slave, with no rest breaks, bathroom breaks, or, I'd bet, meal breaks, maybe the totally unrealistic, dangerous, and unacceptable workload have all taken their toll. And there's no way you could have encountered everything yet, so the irritability of that one preceptor is absolutely unwarranted and not acceptable. To that person, I'd say privately, "I know you were irritated with me the other day
about...but I cannot allow you to talk to me the way you did. As you know, I had had absolutely no break at all, even to urinate, and I guess you probably didn't either, so you know how I feel. I have only been here a few weeks and I don't know everything yet, nor had I encountered this or that yet, so I was slow." YOU must stand up for YOURSELF. P.S. You are stupid only if you allow this to be repeated. Any job that is making you physically sick and gets you calling off while still an orientee - mmm, think twice about staying there if they don't fix this stat.