It turns out my feeling so wiped out all the time isn’t normal and is probably linked to the asthma. My blood oxygen has been going as low as 84% which also helps explain the feeling of faintness and the low blood pressure problems. I saw the nurse who says she’d like to try me on a preventer medication as it seems the asthma isn’t just exercise induced. I’m now on the Clenil brown inhaler, 4 puffs either end of the day. Review again in 6 weeks to see how it’s going….fingers crossed this will help with the fatigue.