Dear doctor.. one week before I had a sex with sex...

Dear Customer
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Is it expected to have AIDS infection in your case ?
its highly unlikly to get infected in this way , you had a protected sex , and oral sex is highly unlikely as well to transmit any infection to you 
What to do next ?
- dont panic , you sore throat is just a sore throat , treat it according to the symptoms which is usually treated in this order :
1. have a rest 
2. drink plenty of warm water and useful drinks such as lemon and ginger
3. avoid smoking and alcohol and cold drinks 
4. take antibiotic for 3 days ( amoxicillin ) 
5. if you symptoms laster more than 1 week , reconsult an internal medicine doctor 
General advices :
1. avoid unprotected sex,  use safe sex tools in the future 
3. take care of your personal hygine and your private areas especially 
4. have a healthy life style incluing : healthy food , exercise and have plenty of rest 
You can also ask our other certified experts in various fields such as: Nutritionists, Lawyers, IT Experts, Therapists, Mechanics, Doctors, Handymen, and more.
Kind Regards

Dear customer , you are welcome 
best regards