Hello all, I recently had a CT scan and the iodine Intravenous blew my vein and am experiencing side effects.?

My arm at first swole up for a while, the doctor told me as long as I don't get a hard lump I should be fine. Now it's a week later, the swelling is gone, but I have a big purple spot on my forarm that looks almost like a bruise that has been there for about 4 days, and today I noticed majoity of my forarm is a yellowish greenish color (like that of a bruise). I'm hoping it's just bruising after the swelling went away, but not sure. Anyone have any clue? Thanks!