1) Unlikely u get hsv from protected sex.
2) i have no idea how the lesion look like, go see a doctor. Can get a hsv test at the appropriate period if you want
1) it is still a low risk because herpes can only spread if there is sore in the mouth, which you dont know whether there is
2) usually genital will present with pain and have a bloster like lesion. But sometimes in can be asymptomatic.
3) you should go see a doctor.
If you are worried about herpes, then go get a hsv test