Haven’t gotten my period!!! There is TMI

Alright, so I need a little help here cause I am freaking out! I haven’t gotten my period in about a week, and normally I am always on time. But about 3 weeks ago I was with my boyfriend and I had given him an HJ.... and here was pre-cum. Anyways, I ended up touching myself with the same hand, but did not put my fingers inside my cooch. But, my boyfriend was fingering me at the same time, So I don’t know if I’m being to worried, or if I should be worried or not.... because I’m quite young and DO NOT WANT TO BE PREGNANT! Please help a sista out... I’m scared asf!!