i think i might have asthma?

so i kinda am thinking i have asthma. i am 11 years old & never had it before. my sister has had it since she was like, 7 or something & is 17 now & still has it. i get out of breath really fast. when i breathe in & out it almost sounds like wheezing almost. i have gym tomorrow & since i all of a sudden have short breath im scared something might happen.

i want to go to the doctor, but what will they do to test me? please be specific. [ i think thats how u spell it, lol.] also when im laying down its kinda hard to breathee..
 
Top