so I'm not sure

Hey guys recently broke up with my boyfriend. He was super childish started harassing me and my family told all my close friends that I was a fat whore etc. anywho, after blocking me on everything he has tell me why this dude decides to call me and be like you cheating bitch you gave me an std. Now I have never cheated on anyone and I high key think he's saying this just for attention and to start another argument with me so I didn't reply and I'm going to get tested. I mean I don't have any symptoms of anything and I've had an std before like I know what it feels like and I'm just really nervous because he was such a piece of shit and I just want this to be over