Bearing your head in the sand is not going to help solve the issue. Let us look at the height and weight chart for women here. This easy BMI calculator chart tells you where you are. Watch the video to learn more about how to calculate your Body Mass Index.
To read this height and weight chart, find your height row from the left and find your weight column from the top, the cross over of the row and column is your BMI. The color also give you some idea of where your BMI are. You want it to be in the green zone. If not you need to take actions as soon as you can. Some additional resources that might be helpful.