i bought the nuva ring for NOTHING

so i got it at the doctors offfice.. he thought i give it a try since i couldn't handle the Skyla iud birth control because it hurt so bad i wanted to die and i cried . Welll i can't put the nuva ring in me because it hurts and i can't push it in... Im struggling so bad and i missed a month without it... How the hell can you put it in without hurting??? shit it hurts and i'm chicken out. But yet i have sex like nothing so i don't understand why it hurts me so much ...