Hello. 26 years old male heavy smoker! I have started to get panicked about lung cancer and metastasis. Please help me! I do not have any one in family with history of this disease. I have a cough that is lasting for 3-4 months. I get extremely tired short breath, hard to catch my breath, headache and dizzy. My chest spikes in every place when I breath and when I do not breath. I get to clean my throat all the time and I get phlegm that is sticky. My chest is sore and all the muscles around my chest it spikes on my throat on my back on my shoulder everywhere. My blood spo2 by my watch says is ok from 93-100 ranges. Im very scared please help me! I am 128 kg 190 cm tall im obese. I have not been diagnosed or been to a doctor. So I do not know what disease I have. Have had one x ray 7 months ago which came out clear.