I've had a cough for about 4 weeks now where it started just as a tickle and I started to get coughing fits very quickly. I'm coughing about 15 times as day where I start to turn purple and vomit clear runny thin liquid and then after I literally cannot breath and I'm gasping for breath (my hole airway feels like it's closing) after a while this tends to go but during this process I feel quite shaky. The cough can be triggered by cold water, deal breaths. Or even swallowing. When I'm about to cough all my eyes water and I get shortness of breath and I've tried so hard not to cough to make it worse. Even tipping my head back sparks it off.