My boyfriend is freaking me out

Okay so I have been on the implant for over a year now and we just started being intimate without a condom. By boyfriend however always pulls out though because he still thinks that he can get me prego. And yesterday we fooled around and I am pretty sure he came in me a little bit because I could feel something warm. And now he is freaking out saying that I am pregnant and he is really freaking me out. Like when he stresses out over something I stress out over it too and vise versa. I also just got done with my period the day before we fooled around too. So can someone please give me peace of mind? I feel like I know that I am not but like I said, when he freaks out it causes me to😓