Hi,
DD (8ys) has SPD but does not have many symptoms now due to therapy for 4 years.
She has always had a very sensitive gag reflex but she does not tend to gag and vomit but gag or cough.
She coughs if she laughs too hard, hiccups, cries, runs or smells something she does not like.
If she gets a cold you can guarantee that she will be off for a few days for coughing fits ending in retching. I am sure it is not the cold making her so bad with coughing but her oversenstivity to post nasal drip from her nose. She had never had a chest infection before despite lots of colds.
I have read this might be linked to SPD. Any advice appreciated.