The town you have listed in your profile has a community clinic with a sliding scale fee - if you have no income, this will likely be free. If you are a minor, your state has free health insurance. I would highly suggest you go and find out why you are having breathing problems as it will severely effect your ability to lose weight. You may also have some metabolic issues going on like diabetes (which has nothing to do with passing out after not eating - that's a different type of diabetes that you are born with). Diabetes in early stages often has no symptoms, or it can make you tired, thirsty and have to pee a lot - but most of the symptoms are not evident until extensive damage has occurred to your body which is why EVERYONE who has a BMI over 25 should have regular glucose testing done. You may also have a hormonal condition that effects your metabolism, either thyroid or other. There are tons of things that can be out of whack, but you will never know any of them (or be able to overcome them) until you see a doctor.
Doctors will all tell you "calories in, calories out" and that all you have to do to lose weight is to create a calorie deficit, but it's just not true for everyone. Personally, I weigh 280 and have been on a 1200 calorie a day diet for 6 months and didn't lose any weight until I added 5 days a week of Yoga (1 hour a day) and 4 days a week of high intensity cardio. Then, the weight just peels off. Especially for people who have dieted in the past, your body gets really good at slowing your metabolism to only need what you take in. But, until you find out what issues you may or may not have, you can't know if you are healthy enough to do those kinds of activities without damaging your body further.