i had a tb 5 years ago and now i am experiencing cough for almost 5 months,,i had a check up 5 months ago with our family doctor and she said that is only my asthma she even prescribed me antibiotic, prednisone and atock..i took this for 1 week but still i have this cough..i already did my sputum test 1 month ago but it is negative..should i go for an xray??i had my x ray 8 months ago and ask me to repeat it with apicolordotic view and it is cleared..?is this tb again???im really afraid because of this....