can i be pregnant ?

so me and this guy have hooked up like 2 times. let me tell you it is some pretty bomb ass sex !! lol anyway so the first night we did it he nutted but he pulled out we did not use any protection and i am not on bc. i looked on this app and i was in the middle of ovulation week. and ever since that day ive been stressed that i could be pregnant. i have been getting really bloated after every meal and nauseous and also my stomach has been hurting alot and i get little cramps here n there. idk if it is all in my head or what. my period doesnt get here till 8 more days so i think i should wait it out because this did just happen last friday so it would be too soon to tell. what do you guys think ??