I am 17 and virgin, yesterday was the 2nd day of my fertile window and while standing & making out he ejaculated on my labia. can i get pregnant by that?

Not likely: It would be very unlikely to get pregnant from this because almost impossible for sperm to get inside the vagina that way. I assume you do not desire pregnancy at this young age & if so you must be careful to avoid such close 1-on-1 contact (God designed one thing to lead to another...) or at least make the young man wear a condom to protect you- if he truly cares, he will; you are worth it