If the intercourse was protected, you couldn't have caught anything at all. Condoms do their job.
There are stds that can be caught even wearing condom, like syphilis and herpes, but that would be in the case she had the typical lesions from both infections on her lips. You would have seen them.
Escorts look after themselves, because stds mean stopping their activity for a determinate period of time and loosing money.
You'll be fine. There's nothing that suggest you could have caught anything if you were protected all the time.