im really scared to go to school with this.

okay so I went for my check up 2 weeks ago and the doctor thinks I have vocal chord disfunction. sometimes it feels like I am not getting enough air into my lungs and then my throat feels cold because I let too much out. my mom is making me an allergist appointment tomorrow but it probably wont be for another two weeks. my school is getting completely remolded and has a big, dusty addition that will eventually be our high school gym but in the meantime is holding temporary classrooms while our rooms are renovated. the problem is, there’s so much dust and other sutff that it makes it really hard for me to breathe, and since I wont have an appointment for awile still, im really scared to go to school because it is so hard to breathe in school and it is so scary not being able to breathe. the worst part is, my school nurse, for some reason, seems to always laugh at me when I come down because I have a lot of health problems that have been medically diagnosed by a doctor but she just doesnt seem to beleive me, like every time I go into her office she laughs. so im really afraid to go there if I cant breathe but im afraid to go to school… WHAT should I do about not being able to breathe well?