Hello Doctor, My Daughter (Age - 18 Months Old, Weight

Hello Doctor, my daughter (Age - 18 months old, weight - 10 kg) was given the vaccination named Quadrovax. Like doctor told us that fever can come and also there will chances of swelling around the area where injection has given, she is having high fever and there is a swelling on her thigh till the knee.Its been more than 16 hours but she is not even able to move her leg. Doctor prescribed the Babygesic to incase of the fever and pain. She feel normal after giving the paracetamol, but again she starts crying with pain and fever after 4-5 hours...Could you please suggest us in this case, what we should do..? I talked to doctor also , now he suggested to give 4 ml imol syrup 2 times a day in place of Babygesic paracetamol...Will it help in her pain due to swelling and fever.. Also normally how long it may take to reduce the swelling and fever..? Kindly help me as it really painful to she her crying..