I was just reading RAYLINSTEPHENS comments and I want to echo the importance of eating enough fats. Your brain keeps growing until you are about 25 years old. All of your neurons require fat to function correctly. Not eating enough fat not only leaves you hungry, but it makes you feel irritable and think less clearly.
I found something interesting this morning and wanted to send you the link to the page. It is the % breakdown of protein/fat/carbs and it shows 2 tables, one USDA and one that is more generally used by the rest of the world I guess. Anyway, I obviously have more luck following the first one on the page and it is possible that is the one you find yourself using without even knowing it.
I realize I asked questions that were nosy to say the least but it is only because if I can help you I will.
I am more than 3X your age and am still obese but I have learned a lot in my 6 months of active Sparking.
If you are using the Nutrition Tracker you will see ranges for everything from calories to protein. At the bottom of the page is a link for a chart to show how you are doing with the %'s.
That said, no I don't think a little more protein is bad for you. At 18 you are still "growing". And you won't be making fat until and unless you eat over your recommended calories. I read in the postings all the time that people are short-changing their protein and carbs but going over on their fats. I am only having problems eating enough fat, I eat within my ranges for everything else. And I am making the extra effort to get my fats in but after all these years it is difficult for me. Not impossible, just difficult.
While I really do admire your mindset and smaller appetite you might be doing more damage to yourself than you would readily accept. If you don't eat enough to sustain your body's requirements it will take your muslce as well as use your fat resources. Since you are exercising you would be devastated if you are losing muscle just to keep your body fed! I know I would be devastated if it was happening to me.
I cannot point you in the direction of the right article but I read that here at SparkPeople. There is just so much information available here at Spark and in 6 months I have read a lot.
You are doing a superb job but try to get your calories into range. Less than 1200 is not recommended anywhere. Add nuts or fruits if you are concerned about the quality of the foods. I wish I had done at 18 what you are doing. But at 56 at least I am doing it now.
I mainly walk outside and have started using the Walk Away The Pounds videos and received a used treadmill. I need to be shoved a little more to do the strength exercises so feel free to push me too!