Please help I am suffering from a mental problem.i am a 19 yr old girl....my story goes...i was born as a very?

sweet n beautiful girl...i was d most pampered...bt d problem wid me was dat i was too innocent and a quiet girl to live in dis world.every1 used 2 tell me how wil u survive in dis world..its goin 2 be really difficult 4 u...though i was sometimes bullied or slapped by some cl mates n teased 4 being a quiet n dumb girl...i didnt pay much attention bcoz i was hppy inside n i was also intelligent...bt sometime ped n i was about 12 at dat tym wen my sister told me a story of a girl who was too innocent and how she was bullied n made fun of...i started feeling scared thinking about myself n so i decided 2 become clever...n from here al d problem started...i started to think of clever ansers for everything...i started predicting everything( for ex. if i am washing utensils.. i wud think if she wud say 2 me oh u do this wrk urself,i hv a maid 4 dis..so i would say.......(something clever)....it became a habit...n it took a toll on me..as i was always thinking about dis people...i did nt became clever but ugly n stupid...ppl became more rude 2 me...i went into depression n even till now iam...n d problem become more serious bcoz i hv started fearing those people..i am scared of dem n keep on thinking about dem...its impossible 4 me 2 do any other work....i was more bullied,teased nd slapped(even as a grown up)...u know wat i do now....i think of imaginary situations n think oh she wud say dat 2 me...n keep on thinking abt it(thing which hasnt even hppnd)....now my only problem is dat i make up imaginary situations in my mind n think oh she wud say dat to me...n keep on thinking about dat particular person al d time...i even think about ppl whom i hvnt talked 2. or ppl who hv been nice 2 me...its killing me...help...pls tel a gud solution.plz help me nd plz also tel me if this mental problem has some name....plz help....