I am a 21-year-old male. I have asthma and hypotension. I am below average weight (5'10'', 117 lbs). Over the last few months, any time I exert myself beyond normal. I get really dizzy and my vision blurs and tunnels and my lungs hurt badly until I take my inhaler. About 60 seconds later, my head started to hurt. Lung pain decreases over the next 20-30 minutes. I take two inhalers, Salbutamol and Fluticasone, regularly. Is this hypoxia caused by my asthma? Is my steroid inhaler not doing its job?