Early sex related. I would be really!

I am a boy 16yrs and had an Intercourse with a girl of same age...I just penetrated into her vagina for 3-4minutes  and Aslo did not tenacuate inside her and also I gave her i-pill withing 30 minutes of that though on an empty stomach . I pill clams to work well within 12 hrs..I gave it within 30 mins and Still worred because of her age..so it boils down to... 1. She was about to begin her periods 2. Had pentration into her vagina but only for 2-3minutes 3. did not ejacuate inside her vagina(did not ejacuate at all). 4.gave her i-pil with water within 30 minutesOf my regretful act So this is the situation and I think i didi everthing rigjt just to be sure on wht to do next(if anything) or anything she should be knowing  and also to ensure if she isnt pregagnat after even this slight chance and taking ever required step after my mistake then please tell me. i need help quickly and I would be really thankful!!!