I'm feeling bad and weak a bit dizzy, and I can't breath properly (it'd hard to take deep breaths like something stopping it I need to yawning and it look like it's help, but it's not all the time.) that starts at the end of July 2016 and I'm still like that. Now I'm bit better but I have headache all the time not a strong pain but is all the time there, usually I'm doing a lot of exercise and I don't have any problem but now if I take 20 stairs or run for the buss my heart start to beat 2 3 times faster than usual. I don't know ow what's wrong with me but it's not normal for me to feel like that one day pretty much okey next day again feeling bad. I really don't know but this breathing think and the headache(I usually don't have headache never) and my heart beating.... Anyway any advice?!? I was at my GP they make me blood test and they day everything looks fine, but I'm not, is it some virus or flue here in London or what is it?!?