Please go on a diabetic diet first,For a couple of days and keep a track of ur sugar level 7 times a day(u search for it online). If that helps well and good. If not, then doctors will suggest you to go for insulin, it's actually very annoying and frustrating, u will have to take injections by yourself on ur stomach or thighs every day 3 times. So it's better u start ur diet soon. So that it will be cured naturally without medication and baby won't harmed as well.
U hv to go to diabetiologist urgently ...ur sugar is very high so u hv to take medicine n proper diet