Our expert says:
I suggest that you consult your doctor for a referral to gastroenterologist, to have a gastroscopy and barium meal done. It is more than likely that you have a gastric ulcer, causing your nausea.
Also ask your doctor to do a lung function test before and after you have taken your asthma medication. This will determine if your asthma is well controlled or not. If your asthma is not well controlled, it is the likely cause for not being able to improve your stamina.
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