This might seem dumb…

I hooked up with this guy and we didn’t have penetrative sex but he did try in stick it in me. Fast forward a week and i get my period and I finished my period but now I’m having cramps like I’m still on my period and like I have a foul smell down there, one of my older friends mention that I could be pregnant. I feel as though this is very unlikely but she disagrees. I’m just curious as to how high of a likelihood that is?