I have been coughing for more than a week now, its worst in the morning before I wake up and at night before I go to sleep. Once I started coughing it becomes a non stop cough and mostly dry cough, for about 10/15 minutes. I used to have a small cough too but the non stop cough usually occurs 3/4 times in a day, but I have no fever or brathing difficulties so far. I'm really worried about it. I don't know if I'm infected with covid or if I have serious throat infection or, some lung infection. Please help