Hi I have a nasal infection which seems to have gone to my chest, my doctor gave me doxycycline yesterday but I had a terrible reaction to it, nausea, massive unbearable headache, aversion to light and sound. Oh I am also regularly on Methotrexate Sandoz (twice a week 7.5 mg a time and in my fifth year of to treatment) my wife called the doctor who said discontinue the antibiotic as it's reacting to the methotrexate Sandoz however I am worse today and coughing up lots of lime green phlegm. Should I go back to ask for a different antibiotic?