My boyfriend started being so rude to me ?

My boyfriend started being so rude to me only because I brought pregnancy up. Because I was late on my period for 7 days, but I just started my period earlier this morning but they way he reacted 😞the way he implied me cheating on him when he’s the only boy I’ve been with. Wow I can’t believe he acted like this when I brought up the possibility of being pregnant when I’m not because my period was late for 7 days. He just made me feel like shit yesterday only because I said that about pregnancy I can’t imagine how he would react if I was actually pregnant. I’m 19 and he’s 18 btw 😞should I leave him?