Curious

Okay so, me and my boyfriend had sex December 13th and it was the last day of my period (barely any blood) we used a condom, he said he was no where near cumming because we just started, and I noticed the condom start slipping a little, but the condom never came off until he pulled it off. I’m supposed to start my period January 6th I’m sure. I’m bloated and I’ve been cramping just a little but not too much. I do juul and I’ve noticed when I do it makes me nauseous so I’ve been nauseous but I think it’s only from the juul. Do y’all think I could be pregnant? I don’t want to be one of those girls that over thinks it but I haven’t been worried until now since it’s closer to my period date. So any advice? Thank you so much if you can give me advice!!