Fake anonymous STD text?

Last Friday my boyfriend got one of those anonymous texting that someone he was with has an STD and that he should get tested. I found out a few weeks ago that I have HPV but you can't really test for that in men so we assume it is something else. But he contacted them through a link the text gave and they won't tell him the person (which I can kinda understand) or the STD. Not telling him the STD is not normal so he thinks it is someone messing with him. He has contacted everyone he has been with in the last year and they all don't know what he is talking about. So they are either lying or someone is messing with him. Like wtf. Either way I would rather be safe than sorry because some can cause fertility issues and I want kids. My boyfriend kinda thinks I am overreacting with wanting to get tested and being on the safe side cause he thinks someone is messing with him. But STDs are not a joke and can affected both of us in possibly negative way if untreated. Like wtf you could have potentially given something to me and you don't seem to care!!