I need to get away from my Mum. She's treating me like a 4 year old!?

Slap her silly. Show her your not a 4 year old. Tell her how you feel, most girls at your age either get married to have some privacy, respect and space and love of course, OR runaway. Tell her how u feel and what you plan to do incase she dosent start changing. Ive seem teenagers take their mom or dad to court due to similar things.