HELP ME IM 17

ok i know i’m stupid for not making someone wear a condom when we had sex, so don’t come at me with that bc i’m scared. so my last period started on december 18th and ended the 22nd. the night of the 23rd, i had unprotected sex and the dude i had it with nutted but after he pulled out. my fertile week was supposed to start january 1st and end on the 7th so i’m supposed to be ovulating rn. my boobs are very tender rn and my nipples are kinda sore too so do you think i could be pregnant? or is it just from me ovulating? my periods are normally pretty regular and my next period is supposed to start around the 20th so it may be too soon to take a test. please help bc i’m freaking out. i’m not on birth control btw