Simply put this forum should not be used for halacha questions. Ask a rov.
However I will point out a few things that others have mentioned that it appears that you are missing some basic facts. If there are only women there, it’s still yichud for sure if it is only two women, if it’s more then it could get complicated. More importantly and the most obvious heter for you is baala b’eer which is that yichud is permitted just due to the fact that your husband is local. What’s considered local and other details are the reason why a competent halachic authority should be consulted regarding potential situations prior to having them occur.