Hi I'm 16 And I Need Help, So Right Now

hi i'm 16 and i need help, so right now i'm freaking out, ok let me explain, so my boyfriend poked his penis in my vagina and im scared he might of pre cumed inside me but he pre cumed before he poked my vagina, and yea he did it without a condom and im alos irregular so im suppose to get my peroid the 19 of november the last time i got it was sep 19, but i cant wait a month to find out please help me im overthing and peranoid right noe help me please please