Not so small anymore

SO Wesley has always been on the smaller side and has been in the 25 % for everything. We took him to his 4 month check-up the other day and hes not there anymore! He weighs 13 lbs 12 oz which puts him in the 65% and he is 24 3/4 inches long which put him in the 45% for height. He also had 4 shots what are about the worst thing ever! He did well but he did get a little fever and his legs were pretty sore.