I just wanted to say you are doing really well so far hun, you have lost 7lbs since you started and considering all the times you are off plan this is great!
Looking at your goal, you seem to be aiming for a very low weight/BMI, when you are currently already a normal healthy weight, therefore your weight loss will be really slow anyway and you shouldn't expect to lose any more than a 1lb a week.
I think the way you are approaching this is healthy and will help you to maintain your weight when you do get to target, by sticking to the plan during the week and then having your indulgences at the weekend.
good luck