My son had these same issues and I took for Sensory Indegration testing. He tested very low and underwent therapy for it. You actually get the therapy thru an occupational therapist and they have specialize in that type of therapy. For instance he would walk into the school cafeteria and start going crazy...we didnt know what was wrong...then he told us that all the smells scared him.

Im not saying this is what you are experiencing but it might be worth looking into. He cant take PE class because of the noise and stimulation...so what does he take instead...BAND...and what instrument...PERCUSSION...lol.

But practicing his bells at home is fine...being in the large group is sometimes really bad for him. One day he was over stimulated in band class...frustrated...then his instrument fell over and the class laughed at him...his first reaction was to throw his mallet. The mallet hit the teacher in the head...it was a bad scene.

No, you're not alone, I hear of lots of BP folks with sensory issues.