See that is where I think schools have it backwards--that they put physical disabilities before emotional ones.
I think you shouldn't hesitate to use the accommodations if you need them, just like you wouldn't hesitate to have a braille transcriber or interpreter.
I had a lot of issues in school because a lot of my flashbacks are school-oriented so there were a lot of triggers in school that would send me into flashbacks. I was pretty much having constant panic attacks in school. Suffice it to say my grades suffered.