So I was burned after having a 3 some, I went to the doctors after seeing symptoms, at the Dr. I was given the Ceftriaxone shot and prescribed doxycycline, for Gonorrhea. I did not get my prescription filled and did not take doxycycline at all. For this std do I still need to take doxycycline or should I go get azithromycin instead because the doxy made me constipated and nauseous. Or is that drug enough to get rid of it.