Teen pregnancy

Me and my boyfriend (im 16 hes 18) had unprotected sex ( he wasnt close bc we ran out of time ) i am about 6 days from my period and i was ovulating when we did it and im super nervous that i might be pregnant my boobs are sore and im nauseous but i think the nausea might be from how nervous ive been about this whole situation i love him and he swears im notand he’s already said he could support us if i am but im very scared ( i took a emergency contraceptive 4 days after)