How to handle wedding stress

So, I am getting married to a guy. Arranged marriage. However, the families seem to dislike each other and almost all the time keep on telling me and the groom that the other family is not good.

This has start taking toll on my and his mental health.

This was an arranged marriage. We talked for 2 months and said yes and for the next 1 month, families met and said yes. But they had a fight after that and now, both families hate each other but we are attached, so, refused to call off the wedding. But now, this is the condition.

Both families hate each other and keep on filling mine and his ears with how big of a mistake we are making and how bad the other family is.

What do I do?