I have some good news for you, from what you have described here you have had NO risk for any and all STI.
This was extremely safe. She even used protection to make a safe act even safer. Don’t worry about any STI.
You could have irritation from the act of been fingered, or perhaps some of the oil or lube.
Or you indeed do have a fungal infection (how do you know) if so this could cause everything you describe.
But for sure it’s not HSV (or at least it’s not from this encounter)