Polyhydramnios support

Does anyone have any experiences they'd be willing to share with me if you had polyhydramnios during your pregnancy? I'm considered high risk and have had ultrasounds/fluid checks every week since 32 weeks (currently 38) and it just developed. Last week they told me my fluid was elevated. Then I went again this week and they told me my fluid had doubled and it could be 1 of 3 things...either Gestational diabetes (just found out I passed with flying colors), a birth defect they haven't detected yet (as I mentioned before I get ultrasounds often and everything has developed perfectly and looks normal), or the type of polyhydramnios that just developes and they can't explain it. I'm just looking for some support or experiences