I had throat irritation and cough for 2 days and i went to a pulmologist she had done xray pa view and prescribed medicine 17 days back my cough has gone within 2 days after medicine but thraot irritation was there for some time but that also settled but from last 2 days i faced coughing at midnight 2-3 times . We use Ac while sleeping but switched off the ac before sleep . Why is this happening ? My xray report was normal should i go for any other test or should I worried?