The chances of you getting an STD from this are very low. Oral sex itself is lower risk than vaginal or anal sex, and since you used a condom, it reduces the chances even more.
If your partner had any sores on her lips, or tongue if her tongue touched you anywhere the condom wasn't, there is a slim chance you could get genital hsv1 (if you don't already have this orally) or syphilis, but the chances of hsv1 without a sore is slim. To get syphilis, you'd have to have direct contact with a sore, so if no sores were present, you're not at risk.
This isn't something you need to really worry about, or run out and test for. Your chances are really, really low.