I am 49 year old female,4 ft 7 98 lbs.For the past week or 2,, I have had a dry cough no fever,no sore throat and sometimes my chest feels heavy. Sometimes I am able to cough up phlegm but not often.I also have been getting headaches when I cough and I have been sleeping more than usual .I have borderline diabetes and suffer with some mental health issues and epilepsy, so I am hesitant on taking anything over the counter as it might affect my sugar levels or will not react well with the prescriptions I am on now.Any suggestions would be most appreciated..