From your description it seems you are suffering from upper respiratory tract
infection which may or may not have travelled down to your lungs. You need to take a course of antibiotics like augmentin
625 mgm thrice a day, take crocin or combiflam 2 to 3 times a day and an antiallergic like cetrizine
twice a day. Also take a PPI like pantoprazole
once or twice a day for the gastritis
and domstal or emeset on sos basis for vomiting. Take adequate rest, drink plenty of water and have nutritious food. You will improve with this but if symptoms continue, you will have to go in for lab tests and a xray of chest for which i will advice you to consult a physician or a pulmonologist.