Is SPD Real?
Of course it is real! I can understand the doubts, when I first found out that is what my daughter had, I was unsure too. I went through five years with her unexplained "symptoms" before I found an answer. Since her diagnosis, she has made some real improvements. What I have learned from the experience is that every child is different and the severity and symptoms can vary.
My daughter just started school and the teacher doesn't believe her condition is real. It is upsetting to not be understood, but unless you have experienced it personally or had a child with SPD, then it is not for you to say if it is real or not.