possible pregnancy ?

guys i’m really scared…. i hooked up w this guy and i didn’t know i was ovulating according to all of the apps and he told me he finished inside and im like huh??? i took a plan b bc i was scared. i felt SO nauseous the next day. today i am sooooooo bloated and i keep having stabbing pains on one side and i am terrified .. there’s no way i could be pregnant right ? am i just overthinking ?