Every time i come to my parent's house i get sick. irritable eyes, sneezing, so much coughing and wheezing within a day of being there. no pets. help?

Environment: Seems to be an environmental problem. More information is needed (eg how far from home do you live (different pollens?)?, pets formerly in the home?, moisture/mold problem in the home?, other irritants (smoke exposure?)?, etc). Regardless, you need a work up for baseline asthma (this is a disease that presents itself with exacerbation even if no cough/wheeze at baseline).