In order to get through school and to be able to work in L&D/nursery, etc., you are going to have to take care of all types of patients and go through all of the rotations. Unfortunately, vomiting and pooping goes along with all of them, babies even spit up milk after a feeding. While you have the time right now, I suggest that you try to shadow a nurse for a day and see what things are really like. You may love it or you may hate it, but it will give you a better idea. Math classes are going to be there, incuding drug calculations, etc. so there is no real way of getting around those.
Hope that this helps answer some of your questions........