Need advice: could I possibly be pregnant?

So my boyfriend tried to hit it from the back and accidentally hit my “hole” twice but it was just the tip. He claimed that he didn’t cum/wasn’t pre-cumming. I already knew that my period was coming the next day, and it came a day late. We were a little worried but it came. I’m not feeling 100% over a week later and he keeps teasing about me possibly being pregnant and having the symptoms of pregnancy. Could I possibly be pregnant?