The symptoms that you have described suggest that you might be having "Chronic Urticaria".There is a type of chronic urticaria called the "physical urticaria" where individuals get hive on exposure to heat or cold temperature or sometimes even on exposure to water.Sometimes these chronic urticaria excacerbate when there is emotional stress.I suggest you consult a senior dermatologist
and allergist for complete work up.
About Quetipine,it is a atypical antipsychotics and although these drugs have very less incidence of extrapyrimidal sideffects.It can still sometimes have acute dystonia
as side effects which presents as muscle spasm and stiffness
in the neck.I presume that you are confusing this for neck pain
and breathlessness.For this i suggest you take an opinion from your psychiatrist
Hope these inputs helps you.