Abnormal glucose test😕

Sooo my 4th pregnancy and never have I failed my glucose tests....i already had a glucose test around 13 weeks...passed. [high risk] now for the common one I for the first time failed. So now I'm being ordered for a 3hr glucose. I'm freaking of course because I'm already high risk, overweight, and I have a Velamentous umbilical cord. Dr says baby is growing beautifully and measuring ahead and NOT concerned... but now I'm going through this. I'll be 26 weeks and only gained 11lbs so far....

Has anyone ever failed a glucose? What was your story and outcome?