HELP?!? gestational diabetes

I’m 13 weeks with twins; second pregnancy. First time dealing with this! HELP!?!

Best diets or something to help avoid GD (Gestational diabetes) or to cope with it.

Failed my 1hr glucose test.

I tried the 3hr glucose test and they gave me the red fruit punch flavor and it makes me sick. Witch is why I usually ask for orange, they told me I can’t have the orange with the 3hr test.

So going to retry the 3hr test while taking medication to help me not get sick with the red drink.

Basically my doctor have already decided I have GD.

If I fail the retry of the 3hr test. I have to do blood sticks for a week.

Any advice on how to manage GD??