Welcome to HCM,
thanks for posting query to this forum,Gestational Diabetes
is special clinical condition and your test needs to be repeated as you have taken only 50gm glucose this is not standard to do OGTT please take opinion of Endocrinologist
Standard Glucose dose is 75 or 100 gm after taking 75 gm glucose samples are taken at intervals.
The oral glucose tolerance test
(OGTT) measures the body's ability to use a type of sugar, called glucose.
You should take normal carbohydrate
diet before the test.
Do not eat, drink, smoke, or exercise strenuously for at least 8 hours before your first blood sample is taken.
Two or three blood samples may be taken at hourly interval.
Fasting should be
1 hour after glucose
2 hour after glucose
Once you repeat proper OGTT then further action depends on result of test,even urine test can be repeated just to confirm that there is glucose in urine or not.
Please take care