Monday I got my 10 yr booster for tetanus. It didn't start hurting until probably 2 days later. Now it's swollen to about the size of an egg, itches, very tender and tough, and feels like fire. Has anyone else felt these same reactions? I've read that it just means you have more than normal antibodies, and one should take ibuprofen. But man, this feels like a bad insect sting!