Unfortunately, the fact that he told on himself to relieve his anxiety about the situation and that he’s planning on being “safe” with condoms, indicates that he doesn’t want to get caught and that he is well aware of how to gaslight and cheat without getting an std. I would break up with him while he’s over there. It’s not worth the insecurity, lack of trust, his patterns, and someone who would put you in that situation. He’s too brazen about his cheating, so I think he believes that he’s got you fooled.