Help!!! Fatigue!!!

Ok guys, I got this cold in feb and it lasted about a week and then left. Well I was couching up yellow mucus and wheezing pretty bad. I still am and now I have this extreme fatigue that I have no clue where it came from. I went to the Doc and they did a blood test for anemia and hypothyroidisim cause thats what they thought it was. Well the tests came back negetive and I started to feel better so I did'nt bring up the wheezing. Well now it's back and it waxes and wanes. Does any one here go thru that extreme fatigue not sause you can't breath just feeling tired and drained..Any advice I would be so thankful! Tweet