13 year old Girl with health issues

Our daughter will be 13 in a couple of weeks. She has been having many different symptoms for the last 2 years that we can't figure out.

Female
Age 13
4'10'
92 lbs
Caucasian, medium skin tone, dark hair, dark brown eyes.
Second of 4 children.
Very confrontational, seems to argue every point made.
Desires to be center of attention.
Steals. Takes things that are not hers without asking. Has taken a friend's jewelry and make-up home once. Has taken candies from teacher's desk at school. Has taking homeopathics, tylenol, matches, lighter, and food from different places in our home. She stores them in her room until they are found by a family member. In July 2010 I cleaned out her room and took everything except her bed out of her room so she wouldn't be able to hide things anymore. We also lucked up freezers, storage rooms, husband's cabinets in the garage and store medications in our bedroom away from her reach.
Seems to need strict boundaries. Doesn't seem to understand 'maybe', 'we will see', 'not now'. Thinks very logically.
Gets angry easily at her mom, siblings or friends.
Often has to be reminded when she should be full and should stop eating.
Likes all food except for mayonnaise.
Puts on weight very easily, is a little chubby for her height.
Petite for her age.. most girls her age are at least 4 inches taller than she.
Got her first period a few days ago... all of her friends have had theirs since they were 11.

Was completely healthy until 2 years ago. She had never been on antibiotics or other medication. 2 years ago I found lots of stuff in her room that did not belong to her and a lot of old food stored in her drawers (also some parasites). She was, at this time, often having stomach pains, to the point where she was in the bathroom vomiting. I took her to the doctor to be checked and it was found that she had parasites. They gave her a medication to get rid of them. The stomach pains did not stop and I became aware that they seemed to be associated with dairy intake so I bought Lactaid and started giving her tables every time she consumed dairy. That helped with the stomach pains.
Spring 2011 she noticed that she had a bump growing behind her ear. We had it checked by a doctor, were told that her blood tests were good and we could have it removed it if chose, though they felt it was harmless to leave it there unless it was bothering her (which at the time it wasn't).

In October 2011, she fainted while visiting her grandfather in the hospital. The doctors checked her out and it was determined that she was fine. Since then she has been having random dizzy spells (un-related to a monthly cycle), though usually on a Sunday evening and Monday morning. She goes pale and feels dizzy. We had her checked out by a doctor during one of her dizzy spells in March, her blood sugar was good, her blood pressure was good, her red blood count was good, but her white blood count was a little low (we were told).
Also in March I noticed dark skin marks on each side of her neck and had them checked out. I was told they were most likely nothing because she was not overweight (so it wouldn't be related to diabetes). Since they have almost diapered.
In February 2012 we finally had a lactose intolerance test done on her (also on myself, her mother, and her little brother). She was positive for lactose intolerance (as was I and her little brother). Her blood sugar dropped after taking the lactose (we were told if it rises it is not lactose intolerance but if it stays the same or drops it is).

A couple of weeks ago the bump behind her right ear started to bother her (we were told it is a swollen lymph gland but the swelling is just not going down and has been there for a year now).

Last week Monday she felt cold in the morning, in the afternoon she came to me and said she could not pee even though she felt she needed to. I tested her urine for protein (because I have a kidney disease and thought to rule it out). It was positive for protein so I took her to the doctor. They said there was no protein in her urine but there was puss and blood and gave her antibiotics for a bladder infection. They also made an ultra-sound and x-ray appointment for her, as well as an appointment to see a surgeon about the bump behind her ear. Those appt are all next week.

I don't know what is going on with her. She used to be a completely healthy person and now for the last 2 years her health has been topsy turby.