Am I being extremely unhealthy with my eating?

I am about 5' 7" or 5' 8", my weight is about 170, I am a bit curvier meaning i wear a size 34 D bra and have a big butt. I don't look really fat but I do have fat on my body. I wear size 6 or 8 pants, medium shirt, and 6 or 8 dress. I have decided the past three days that I am not going to eat a lot which is shocking because I am like addicted to food. On the first day I had an Oreo pop tart (my splurge), a glass of milk, and a fourth cup of miso soup. The next day I had a 2 small as in like tinny blueberry muffin, about a cup of white rice cooked and a tiny bit of chicken (grilled) and by tiny I mean like about a 1/5 of a regular chicken breast. Today I have a taco with meat, and cheese on it. I been trying to skip lunch which isn't exactly healthy to me but I just wanted my body to eat of the fat. I don't think I am going to eat anything else today. Am I not being healthy to my body. If I am, suggest some diet that allows my body to burn of there fat and good exercise routines.