Jade,
You really need to speak to someone in school or a relative who can make everyne else understand what you are going through. One of your teachers MUST be able to help. have you got a guidance teacher? Can you write everything down that you are experiencing so you can just hand it to a teacher instead of having to explain verbally to them?
How did you get on today?
Can you go to the doctors yourself (i don't know if an adult would have to accompany you?)
What about a health visitor I know they deal with families with children under 5 but I'm POSITIVE they could help you. Even get a phone no from your local doctors surgery and phone a health visitor.
Lucky