COULD I BE PREGNANT? FEMALE 17

I F(17) recently saw my boyfriend and we did some sexual stuff but none of it was penetrative. The most I did was sit in his lap while we both were naked and like his penis was against my vulva/vaginal opening after he had recently orgasmed but he'd wiped himself off and he didnt ejaculate in or on me or anywhere near my vulva. This happened in the evening (6-7pm) 28th of july and I took levonestrogel (unwanted 72) on the 31st around 5 pm. My period had just ended on the 25th and I started bleeding (idrk if it qualifies as an actual period) on the 7th of August and it stopped on the 10th. Is there a chance im pregnant? I'm really scared, please help