I don�??t agree with your dilatation .Of course exercise is important to weight loss (fat loss)
The amount of muscle you have on your body makes a big difference on the amount of calories you burn. lets say you have two women both weighing the same but one at say 28% body fat and the other at 18%.
That would mean that the lady at 18% has to eat more calories in order to maintain her weight because muscle burns calories unlike fat that just sits there. If she was a good dilatation she should calculate you BMI and then give you an amount of calories to eat in a day.
Look at me. I am not over weight but I am over fat 28% BF If I chose to keep my weight the same around 120 to 125 as I put on muscle I would have to slowly increase the calories I eat. The more muscle you have the more calories you burn per hour even when you are sleeping.
Because you work out I don�??t think for your height you should go any lower than 1300 and really that is pushing it. That�??s like me eating 1200 calories it worked but I took the weekends off as cheat days because I did not want to lower my metabolism it worked quite well but I was only working out 2x a week.
At 5�??9�?? if you weighed 155 lbs your BMR would bee about 1500calories supposedly a 155lb person who does not exercise can eat 1800 calories a day and maintain that weight. So Why not try 1300 calories a day, and on the weekends or twice a week bring it back up to 1800 calories so you don�??t slow your metabolism down.
Here is a calculator to run your numbers it just uses weight not Body fat so it is not great but it may help you decide what calorie rang you want to be in michaelandkendra.com/BMRCALC/CutWomen.xls
Do you have a food scale?
I find that it helps a lot. Keep track of what you eat on fitday.com. I actually had a hard time getting my calories up to 1200 when I was tracking them. I find that it really makes you think about what you are eating.
We are all different and have to find what works best for our selves for me if I want to lose weight I stay away form any processed carbs, sugar, bread, pasta, I feel best when I eat meat, fruit, and veggies, raw nuts and plain yogurt. If I do eat bread I only eat one slice in a day.
If I eat sweets I then loss complete control over my eating I will not stop eating until I go to sleep for the night and my stomach will heart like crazy from all the food I put in it. I find that if I stay away form anything that has sugar in it for about 2 weeks I then feel completely in control of my hunger.
Good luck