 [ Symptoms ] the doctor diagnosed me with epididymitis and prescribed me with a course of doxycycline for 7 days [ Disease ] just relax you simply have side effects of antibiotics like gastritis and acid reflux causing chest and stomach discomfort you should simply take antacids like milk of magnesia and also take empty stomach proton pump inhibitor like omeprazole till you are on antibiotics avoid spicy foods and take probiotics like yogurt you will be better soon hope this helps regards