Any negative effects from being on a low carb diet?

Question, Question Question!! I haved only been using this low carb diet for 10 days. I noticed that 2 days ago my BG was higher. I have been having the same elevated readings after meals for the 2 days, with no change in diet. I am not sick, that I know of, and I have not changed anything else. None of my readings went to 200 or over, but the highest was 185.

Has anyone else experienced this? Thanks for your help!