You really need to talk to your mom about this. If you feel she won't listen, then put it in a letter to her, people seem to hear more when they are reading it. All of us have emotions that fluctuate to some extent throughtout the day, and this is normal. But it sounds like you have some anxiety about your appearance. At your age a lot of girls worry way too much about this, but you will soon discover, that it plays a very small part in who and what you are. You can be popular because you are fun, sweet, witty, and bright! Just be yourself, be happy, it's infectuous and makes people want to be around you. Nobody looks perfect, and as girls, always feels they need to be "perfect" but this just doesn't exist. People will like you for who and what you are, no matter what you look like. As females we are too critical with ourselves and need to spend more time on developing what's on the inside, because this is who you really are. I know you have met people that you didn't think were really attractive but then once you got to know them, you found they were attractive. That's because people like who you are, not always how you look. Concentrate on having fun, getting your education, and not worrying so much about what others think, and life will fall in place for you!
I don't think you are bipolar. Fluctuationa in a person's mood during the day and your overall description sounds more like Borderline Personality Disorder to me. You should get a diagnosis from a qualified psychiatrist.
The difference between bipolar type 1 and 2 is the severity or the manic episodes called mania and hypomania. Hypomania is less severe than mania which would suggest it is not supposed to interfere with your daily activities. A person experiencing psychotic symptoms such as hallucination and severe paranoia and manic episodes would suggest bipolar type 1.
M4