Hi giving oral sex is really low risk activity and no testing would be recommended with out symptoms but since your married test for the below for this protection.
1. Gono------7 days post esposure
2. syphilis---6 weeks
3. herpes ---3 months.
But the doc said it was strep.
3-4 days is to soon for symptoms for gono to appear. really takes about 5-6
Go get tested and if your ok yoiur husband does not need testing.
Giving oral sex is really low risk activity and if the person did have gono i dont think he would let you give him oral as the pain would be to much.