I agree with @JustLookin - you definitely need to be checking more. Fasting, before you eat, 2 hours after, and overtime you feel weird (high or low).
I donMt want to comment on your targets, because they may be different from mine (my targets are a good bit higher than Justlookin’s). For me personally, during this pregnancy, my targets are fasting < 6.5 mmol/L ( <117 mg/dl), before meals <7.0 mmol/L ( <126 mg/dl), 2 hours after eating <10.0 mmol/L ( <180 mg/dl), and never higher than 11.1 mmol/L ( <199.8 mg/dl).
I agree that it’s very important that you know how to do a correction, but if you don’t know now, you will likely need a doctor’s help to learn. I’m quite a bit more sensitive to insulin than JustLookin - for me, 1 unit of insulin drops my blood sugar about 2.5 mmol/L (45 mg/dl). When not pregnant, I check my BG every hour after a correct, but now it is every 30 minutes. If my blood sugar is not trending down properly, then I take another correction. I am going too low, or already at target after 2 hours, I’ll eat a small amount of carbs, depending on how much too low I am.
If I were you and my blood between was over 200-290, I would do a correction. If it hasn’t come after 2 or 3 hours, I would do another, and head for a walk, and so on. If it hasn’t come down after a fourth, I would head to the doctor. If I didn’t know how to give a correction, I would try doing some physical activity (say 30 minutes of walking or swimming or biking), and if that didn’t bring me down under 200, I would go straight to a doctor. If my sugars were over 290, I would also check my urine (using ketostix) or my blood for ketones. If that’s positive, I would go straight to the ER. If negative, I would do as above, with the exception of, if after 4 corrections there were no change, I would go to an ER instead. If my sugars were over 360, being pregnant or thinking I was, I would just go to the ER. It’ better not to risk your health or the baby’s.
I would say, if your BG is below 200, or you can get it there using a correction, then you can wait until the 18th to confirm if you are indeed pregnant. If you can’t get it down below 200 using a correction or if you don’t know how to do a correction, I would check for ketones. If none are present, I would see a doctor first thing in the morning. If you have ketones, or a number close to or over 300, I’d just head to the ER.
Update us and let us know how it goes!