There is a theory attributed to a 14th century friar that is now called "Occam's Razor." While there is more to it, the basic idea is that when there is a simple explanation for something, contrasted with a complicated explanation that relies on unexplained phenomena, you should put your money on the simpler option.
It's kind of liberating.
Complicated theories tossed aside, I see the evil Weight Loss Debacle (frozen... plateau... constant dieting... no results... occasional Oreos...) in simple terms -- not enough exercise, or too much food, or a combination of the two.
I get headaches when I exercise, but the weight's not going to budge unless I exercise.
So, get used to cardio and headaches.
Cuts like a knife :p