Immunizations

so my son got his 6month shots on june 6th & today is the 17th he still has a lump/knot at the injection site with mild redness & im starting to become concerned is this normal?

Im going to call his pediatrician tommrow.

Im even more annoyed because typically i ask for the same nurse to do my sons immunizations & this time they sent in someone different & im a nurse myself & can totally tell when someone is NOT confident in what they are doing..