What Causes Fatigue Along With Shortness Of Breath?

I have been having a certain feeling of sob i have asthma but i never had this problem im severely exhausted no matter what sleep i gey my doctor i finally begged my doctor to do an xray to see if there was anything in lungs he said no but i continue to have shortness of breath my mom a uear ago had a massive stroke i take care of her i remember her being tired n breathless she was going in for xray but before that had massive stroke got diagnosed with afib n she did have a blood clot that went to brain im so concerned he is just having me take sleep apnea test which i took two years ago n wad negative i feel he thinks im a hypochondriac but i seriously take my albuterol every four hours n feel its not asthma related i want a ct i feel something just isnt right n i fo have hbp n high cholesterol thanks carol