Are allergies/asthma related to autoimmune disease! since both are a an over reaction of the immune system?

No: It makes an interesting hypothesis but there is no evidence to prove it. People with autoimmune disorders can develop lung disease that are often misdiagnosed as asthma. Check this out: http://www.Dailymail.Co.Uk/news/article-2032695/venus-williams-speaks-sjogrens-syndrome-forced-us-open.Html venus williams was diagnosed with "asthma" previously that turned out to be something else.