Jackie, you can always slow down a bit if you're feeling overwhelmed with all the new changes. Some people do best "cold turkey" while others need to take baby steps.
It's possible you may even need to eat a few more calories if you find you're losing too quickly. (I know what you're thinking.
) When I was seeing a dietitian a few years ago, I was losing a steady 2 pounds a week eating between 1700 and 2000 calories a day. I was about 210 pounds at the time.