Oo normal yan, mama! Lahat ng vaccines may side effects kahit minor lang, at ang swelling at slight discoloration sa injection site ay common talaga especially sa 5 in 1 dahil maraming antigens. A few of us moms here had the same experience sa aming babies, one of my friends' daughter had dark bruising on one leg pero nawala in a week. Usually it subsides within 3-7 days, pero if it gets worse, super mainit ang area, o may pus, better check with your pedia na lang para sure.