var query = MongoDB.Driver.Builders.Query.And(
    MongoDB.Driver.Builders.Query.GTE(
        Constants.AnalyticsInteractionsFields.StartDateTime,
        DateTime.Now.AddDays(-dayscount)),
    MongoDB.Driver.Builders.Query.EQ(
        Constants.AnalyticsInteractionsFields.SiteName,
        Sitecore.Context.Site.Name));

var interactions = driver.Interactions.FindAs<VisitData>(query);`