Ketones in urine on glucose challenge day

So I had my GCT today (the 1 hour). I ate normally all week, but obviously didnt have many carbs and sugar today. My test was at 4. I've done the keto diet before and it took at least 2 days for ketones to show in my urine, so I'm a little worried that they appeared today. My blood pressure was also a little higher, but I had to have blood drawn for the test and I freak out a little lol. Foes anyone have a similar experience and what was the outcome? No complications so far with this pregnancy. TIA!