Ok

Thats fine

Yes. This is not OGTT , but this is known as GCT (Glucose Challenge Test). This is a screening test for Gestational Diabetes. In this everything is done on the same visit. You just have to sit at the lab for one hour. In conventional OGTT you have to take 100 gm of glucose and so many pregnant ladies find it difficult to take 100 gm of glucose. Then it involves 5 visits to the lab and the whole day is wasted. Next day you go to get the results. So this is a convenient screening test.

It is alright. That is how they do it everywhere

Ideally should be done by venous blood sample But glucometer reading will also be ok