I am thirteen years old and I have been sick for around six months. I have had tons of neusea, dizziness and I get headaches constantly, I usually get them in the morning and then they will get better through the day or it will just be a big light headed headache that lasts for about ten seconds. I get some really bad stomach aches and sometimes I feel very weak but then that turns on and off. And finally I show up with bruises out of no where but that may not be me getting sick. I went to the doctor around four months ago and took medication from what they thought I had a sinus infection, I took it for about 4 weeks and went back they said it was completely gone. I started getting all the symptoms and now my family thinks the doctor’s are wrong. Should I get a blood test and are these symptoms for some types of cancer? I know it probably doesn’t but the more I read about it the more worried I am. Thanks so much. =]