What kind of flu caught me again I can't understand. I'm getting sick …

What kind of flu caught me again I can't understand. I'm getting sick for the third time in a row, not able to recover from the previous illness, and it's interesting that there is no fever.Here and now everything was fine, thought I was going to get better, but it wasn't like that, I lay down while watching YouTube, started again in the third time in 1.5 weeks to be sick throat. Maybe someone has encountered this. ?