HELP pls..

had protected sex on the 3rd of feb 2019, didn’t even cum in me and we used a condom, checked for tears by putting water in it, and there were no tears, and he was only in for 45 seconds. my boyfriend left for germany on the 7th, the day i was supposed to start my period, and i haven’t started my period, it’s been a week. before we had sex whenever he would finger me i would come home and wipe and see some bloodied discharge, but it only happened after he fingered me and never after that. could that be delaying my period and my stress? i’ve felt really stressed out, my emotions are all over the place. please help me. i’m 17. also, i had my period that ended on halloween 2018 and skipped the whole month of november and didn’t get it until mid december so i’ve had a long cycle before and then when i got it in january it came a day early and i had terrible cramps. are my hormones off? is my body just going through changes? could it be my stress, im stressing so bad i can’t eat? help:(