Failed Glucose Test

Mama101

I’m 39 weeks and just now found out I failed my 1 hr test. The dr asked me to do my 3 hr test tomorrow but I’m wondering what good it’s going to do me at this late in the pregnancy? I’m due Sunday. I asked the receptionist because the dr was in a rush what would happen at this point if I failed the 3 hr test. She said I might have a big baby. Can anyone give me anymore information on this? I have 3 kids at home being at an appointment for 3 hours is tricky because the only person I have to watch them is our 83 year old grandmother 🤦🏼‍♀️ is it worth it at this point?