Ma'am...me And My Girlfriend Didn't Had Penetrative Sex. But I

Ma'am...me and my girlfriend didn't had penetrative sex. But i just touched her vagina with my penis 2-3 times yesterday. I haven't ejaculate at that time but i had pre cum and after that i did fingering in her vagina. She had just finished her periods day before yesterday means just one day before we did this. She had 3 days periods occur after every 25-26 days. To avoid any kind of risk can we take pills like i-pill. She is 19 years old....what we should do now .
Plz mam help us and reply soon.