BV from big d??

I only get BV from guys who have big 🍆.. is this normal?? I been seeing a guy for 2 months but it’s long distance so we don’t do it all the time. However i got BV from him early on & i managed to get myself back to normal down there after using boric acid, probiotics etc. Once my v got back to normal, 2 weeks later we saw each other again & we used a condom the ENTIRE time and 3 days later i have BV again bc i can smell it. Not sure what to do. The same thing happened w another guy who also had a big d. I done it w almost 30 guys & literally only gotten it from the 2 guys w big d. I’m really sad because I really like this guy and we’re talking about getting into a relationship, but this bv issue is annoying.