I am 38 weeks pregnant, had a vomiting bug yesterday, drinking lots of water but urine still dark. Have been tested twice for gestational diabetes, last test 2 weeks ago negative but close (8.8). Is urine related to developing gestational diabetes or just dehydration due to tummy bug? This is my third pregnancy, all pretty normal, good BP and very little swelling (only in last couple of weeks). Age 37.