My mum is over protective and does not give me enough freedom?

i'm 15....my mum is divorced and single...in her menopause.... she doesn't let me go out after 7.. calls me every hour to check on me.. doesn't approve of facebooking its not that i don't like her but she has to give me a little more space . i get laughed at by my friends if she calls me by her stupid childish nicknames.... and recently she' s even beginning to follow me wherever i go.....i'm tired of all this...what should i do??