Hello,
Thank you for posting your query at DoctorSpring.com
You had sore throat one week ago, taken azitromycin, improved. Now you are worried about std and white spots
These white spots on posterior pharyngeal wall are most likely collection of lymphoid tissue and we need not to worry about it. Still you can do throat swab test, so it will rule out any std. At present you are asymptomatic, so you don't require any medicine
Hope this helps
Best regards
Feel free to discuss further.