2 weeks and not in ketosis

My wife and I started at the exact same time, she hit ketosis by day five. Im 14 days in and have not (using test strips). Every single day i'm under 20grams of carbs and i'm within 1-3 percent of my ratios of 75/20/5

Ive read every  body is different, but its getting a bit frustrating. I have lost weight in the 2 weeks (6 pounds) and i've decided to give up diet soda next week (1 a day) to see if that makes a difference

Has anyone experienced something similar? any tips?