My preterm baby ( 33 weeks and 5 days) is 2 months old now. Her corrected age is 25 days and weighs 3.3 kgs now. She had her painless vaccination on 4 oct and has now developed swelling in her left thigh( after 22 days) She cries a lot in pain the entire day. Is the swelling due to her vaccination? Is it possible to for the swelling to develop after 22 days of vaccination? What should i do? Currently i am giving her 10 ceff drops and calpol - 6 drops thrice a day. Is there a better solution to this problem. Just fyi - my baby is mostly formula fed.