Just started Keto. On day 5 and wondering if it's working.

I started Keto on Monday, April 2nd. I've been trying to keep my net carbs under 20g per day. The majority of carb intake has come from vegetables with a little from dressings or lemon juice. Otherwise I've been ingesting heavy cream in the morning with my coffee and eating allot of meat and cheese. I get hungry frequently and snack on fresh mozzarella. I've been eating mostly beef, eggs, cheese, and salmon for protein.

I've been testing my urine daily (usually in the morning just after I wake) for the presence of ketones. So far I have been getting mostly negative results. Although twice the test strip appeared to show trace amounts. I haven't noticed the change in taste or smell of urine so I fear that I'm missing something and am not entering into Ketosis.

My suspicion is that my total caloric intake is too high and that perhaps as a result, excess protein is behaving like carbohydrates in my system. Does anyone have a suggestion?