The risk for getting anything from receiving oral sex is VERY low.
Gonorrhea: If you got gonorrhea, you might see symptoms like discharge and burning within 2-5 days. Not everyone gets symptoms.
Chlamydia: Oral chlamydia is not common, and she would have had to have oral chlamydia to give it to you. It could happen, but it is extremely unlikely. The symptoms and time frame are similar to gonorrhea.
You could get tested for both if you wait about a week after the encounter, but really, the risk is very low.