Hi I had Flu a few months ago and a cough, but when I was coughing sometimes no sound came out, and I have recovered from the flu, however sometimes when I laugh out loud or cough there is no sound, it s lasts briefly, and now I ve noticed when I am talking and when I sing my voice is breaking and I have to clear my throat alot lately. What could be wrong? Is it voice box cancer? I am a woman age 57 years