HepB vaccination - side effects a week on?

[ElornaElephant]

I had my first Hepatitis B vaccination last Wednesday. Initially I had a bit of soreness and tenderness in the area, fatigue and mild flu-like symptoms which all went away within a day or so.

However today the injection area has suddenly become swollen, it feels as if there's a hard swelling/lump around the size of a 50p coin under my skin and it's very itchy. I have also felt particularly and unusually tired today with a loss in appetite but not sure if that's just because I'm busy!

I'm just wondering if this is usual, to suddenly have side effects crop up a week after the vaccine?