i am an 18 year old girl with asthma...but for the past 2 years
i am going threw alot a weeks having shortness of breathe...this can last up to 5 or 6 weeks and i get about a 2 week break of not having this shortness of breathe sometimes i dont even get that...i am on to in halers ventolin 100mg and becotide 250mg alot of the time these dont work i also have a nebuliser...but i used to be able to go walk on long journeys..but now i cant..i cant even walk the shop which is less then 5 mins away without getting very bad shortness of breathe...i used to be really active till this came a long...but i am going to the docter and he keeps telling me its nothing and that he cant hear anything in my lungs but it is getting really annoying and making very tired because i am not getting enough sleep at night.....does anyone else experience this or maybe no what might be wrong
i also do not smoke and i am not around anyone who smokes

thanks in advance melissa